Hello Dirty,
Here is some info (opinion?) on deep cell batteries. Keep in mind this was written from a RV perspective, not solar.
http://rvservices.koa.com/rvinformation ... teries.aspAs far as solar panels go, my understanding is that monocrystalline is more efficient than poly, also more expensive. I have my eye on this set up.
http://www.amazon.com/gp/product/B00B8L ... PDKIKX0DERAlso, I would give serious thought to a WFCO or Progressive Dynamics power center. With the ability to charge batteries, A/C breakers and DC fuses it gives you a lot more options and protection. IMHO.
Budgeting for one of these conversions can be complicated. Wants vs Needs etc. I have been collecting items for almost a year now, and just started the insulation phase last week. My build will be a Harley Hauler/Camper set-up with A/C, toilet/ shower combo, fridge, microwave, bar sink etc. Not easy in a 6x12 platform. Take a look on ebay for items, (new and used) and sometimes even on this forum. I scored my A/C, 2 windows, and a WFCO 8955 from this site!
Good Luck and keep us posted on your progress. I have been taking pics, and will start a build journal thread as soon as I have some real progress.
McDave