congrats grump,
as far as financing there are construction loans that are availible for 100% of the project, then you can secure a conventional home loan from a bank when you are finished since you, now complete house will be worth more than it cost you to build it.
as owner-builder, if you are not familiar with the ends and outs of building a new house i would read several books on the matter, and once you do have some plans drawn up, make some copies or have subs come by and bid off your set, but you will need, site work, underground plumbing, foundation, framer, rough plumb, rough elec, weather proofing, siding, and roofing (your company or you), drywall, paint, cabinets, finish plumb, finish elec, doors, flooring, landscaping, moving in. this is just a general overview a book will go in more detail. as well as you will have inspections at various stages, etc etc