Another newbie question about his trailer order

Greetings all, I've been lurking here for a while getting ideas. I am a motorcycle track day junkie, and looking for a trailer to serve as garage/storage for my bikes when not at the track, then to also serve as a temporary residence when overnighting track side. I am not looking for any cooking facilities or bathroom/shower stuff as this is normally available.
So, tow vehicle is a newer Volvo XC60 rated at 3500lbs. This means a single axle with brakes...that decision is done! Size 6 or 7x12.
I'm starting with an aluminum trailer in mind (looking at Neo right now) for light weight and corrosion resistance, but price may put me back towards a steel trailer.
Please help me choose the options that I should have the built in:
1. Flat vs Rounded roof? Flat would be easier to insulate, but would require an extra 6" of headroom bringing the cost to about even between the two.
2. Windows- I think its worthwhile to let the manufacturer do this. the question is 30x30 or 30X15? It is nearly double the price for the larger window.
3. Electrics - just north of $1K for a 30amp package including 4 overhead LED lights, 2 exterior quartz loading lights, 3 110v outlets, switches, shore power connector, and distro panel. I've read here that Neo's wiring is sub-par and have the know-how to do it myself, but is it worth the hassle?
4. Insulation - $350 for wall and ceiling insulation. Worth it or DIY?
5. Walls and ceiling - I love the clean look of the white walls and ceiling, looks like its almost $300 for the white vinyl, I assume aluminum would be more. Worth it, or should I just paint the interior Plywood and call it good, or find a supplier to add the white alu or vinyl later?
6. Neo's L-Track seems expensive at $16 per foot. I think I can add it myself later for considerably less. Maybe I'll use bike specific rear wheel mounts to get rid of straps and keep from having tracks to collect dirt and gunk, etc.
7. Rubber coin flooring is over $1K for the floor and ramp. Seems way cheaper for the material, but what about installation?
All in all, I'm thinking to order it basically stock and do the work myself with the exception of the windows and vent/ac bracing.
Thoughts?
So, tow vehicle is a newer Volvo XC60 rated at 3500lbs. This means a single axle with brakes...that decision is done! Size 6 or 7x12.
I'm starting with an aluminum trailer in mind (looking at Neo right now) for light weight and corrosion resistance, but price may put me back towards a steel trailer.
Please help me choose the options that I should have the built in:
1. Flat vs Rounded roof? Flat would be easier to insulate, but would require an extra 6" of headroom bringing the cost to about even between the two.
2. Windows- I think its worthwhile to let the manufacturer do this. the question is 30x30 or 30X15? It is nearly double the price for the larger window.
3. Electrics - just north of $1K for a 30amp package including 4 overhead LED lights, 2 exterior quartz loading lights, 3 110v outlets, switches, shore power connector, and distro panel. I've read here that Neo's wiring is sub-par and have the know-how to do it myself, but is it worth the hassle?
4. Insulation - $350 for wall and ceiling insulation. Worth it or DIY?
5. Walls and ceiling - I love the clean look of the white walls and ceiling, looks like its almost $300 for the white vinyl, I assume aluminum would be more. Worth it, or should I just paint the interior Plywood and call it good, or find a supplier to add the white alu or vinyl later?
6. Neo's L-Track seems expensive at $16 per foot. I think I can add it myself later for considerably less. Maybe I'll use bike specific rear wheel mounts to get rid of straps and keep from having tracks to collect dirt and gunk, etc.
7. Rubber coin flooring is over $1K for the floor and ramp. Seems way cheaper for the material, but what about installation?
All in all, I'm thinking to order it basically stock and do the work myself with the exception of the windows and vent/ac bracing.
Thoughts?