Re: new to buses
a 750 watt inverter will run some small things, you will need more than that, depending on what all you run on 110v. I think the first thing you will need to do is to design your basic floorplan, after determining exactly how you are going to use your bus. Generally you need to plan your bathroom/kitchen areas first, as that is where all the water lines, etc are gonna be, as well as part of the electrical, food storage etc. if you don't have a lot of funding, you can normally get a used camper, or trailer, etc really cheap almost anywhere in the usa, and use the appliances, etc.
As far as the rear heater, removing or moving it elsewhere in the bus would mostly depend on if you were going to need it while driving, as it only works when the engine is going. most people remove them entirely, and rely on the front heater/defroster and use propane or electric heat for the house part of the bus.
There is a lot of good information on this and other bus bbs sites, as well as a wealth of information in the photo sections.
Jesus Christ... Conversion in progress.