I'm not much older than you (27), working on a very similar plan on a 2001 f350 platform. I am married and its pretty rad.
If you think you will make a scratch build self sufficient rig in 3 months for 30k including the price to get the 450 up to snuff, thats a big push. I think I was in the same overly ambitious boat about 6 months ago in the initial concept stages.
If you are planning on modifying an existing platform, like an alaskan or a uhaul box or something, you might have a shot at it in three months. But for a
nice scratch built tube frame chassis with sheet metal skin, expect maybe 6 months and 20k plus for the camper build alone, no ford parts involved. It took me a month to build my three point mount and start to get aluminum on the truck.
Things I would consider.
- Pick one project. If you are going to build a camper, dont worry about your truck interior. Do that second.
- 37" BFG Baja TA's on 16.5" HMMWV wheels are about your only option for big military beadlocks given your budget. They are cheap and they work.
- Don't forget the cost to paint or finish whatever you make.
- Galvanic corrosion. If you dont know about it, look it up.
- 3 point mount. Your frame is gonna flex a bunch, if you are using aluminum (brittle) you might experience major stresses.
- Old RV stuff will work, but you will be amazed at how poorly its made.. if you are building a nice rig, you wont want to finish it with stapled particle board.
Regardless, its a fun project. Let me know if you have any questions I can help with.