Plumbing from front to rear?

I've started to build my tongue box to house my diesel heater and power banks and realized I have more than enough room. In the 2nd photo you will see my galley kitchen area with a 10gal water tank under the counter. Off to the passenger side is a box I built to hold my on-demand hot water heater.
So now that I realize how much extra room I have in my tongue box, I'm considering moving the water heater to the front and plumbing from front to rear, rear to front, etc.
Is it a bad idea to consider plumbing from the heater in the front the rear? Is it even possible to make the ShurFlow pump work with that kind of distance? If this is bad idea just say so, otherwise what are the recommendations in doing so?
So now that I realize how much extra room I have in my tongue box, I'm considering moving the water heater to the front and plumbing from front to rear, rear to front, etc.
Is it a bad idea to consider plumbing from the heater in the front the rear? Is it even possible to make the ShurFlow pump work with that kind of distance? If this is bad idea just say so, otherwise what are the recommendations in doing so?