When I built my house, I took out a construction loan. I DIY built the house myself. Pretty much all of it. I cleared the lot. Subbed out the excavation and foundation. I framed the shell. Hired a mason to build the chimneys. Hired a guy to install the oil tank and the oil burner. Hired a crew to hang and mud the drywall.
Framing, roofing, siding, windows, doors, plumbing, electrical, radiant floor heat, insulation...flooring, tile, built all my own cabinetry, trim work, painting...that was all me.
I presented a package. Budget, timeline, drawings. Took a few tries but I found a bank to offer me a construction loan that after getting the CofO would convert to a 30-yr fixed. I had 12 months to get the CofO. Got it in 10 months.
I think the loan came with an offering of 4 draws. I asked for 6 and they gave it to me. Did the sitework, excavation, got the foundation in, and the framing done...call for a bank inspection. A guy would come out see the work was done and they'd release $**,000 to cover those costs, the first draw done. Rinse and repeat.
Have a timeline. Know what you're doing. I built solo, my wife helped here and there. My kids were young, 3 and 5 years old. But they were good for organizing cutoffs. If I needed a 34" long 2x6, why it was right there! But my wife was also a great as a go-fer. I worked my tail off, sun up to sun down. My wife did to. A sort of funny memory was her covered in oil-based primer after using a 4" paint brush to prime a little over 5000 linear feet of cedar clapboards on painting racks we cobbled together. She kicked tail. Never whined. Just helped when and where she could.
Finished construction and went into the bank to do the paperwork to convert to a 30-year fixed. The women at the bank said they had a pool, with everyone guessing how long until I gave up and walked away from the build. No one thought I'd finish the house, which wasn't a bad bet as this was before I owned air tools. Heck, before I owned many tools at all. So they gave the money in the pot to me! A couple years later I converted to an 8-year fixed. Then paid that off a few years early.
Have your ducks in a row. Let them know you have the tools, the know how and the time to get it done. And the resources as well.
Good luck with it!