What are some financing options for a pre-sale rehab?

This is where pre 70s is advantageous.

Ryan does it come with a documents package? 

I appreciate that you're giving me more food for thoughts.

If you have a specific area you're targeting your agent could send out a letter to the owners of properties in the area indicating that he has a pre-approved buyer looking for properties just like theirs.

You really should just discuss with your lender, or another one if you don't like your current one.For one, pre-covid conforming loans don't go below $50k. 

Are you pre-approved for a loan? 

Most lenders want shopping center 50% pre-leased before the construction loan starts for non-experienced developers.The cost of construction per ft for a one off building is very high because the starting developer does not have the volume to save money ordering in bulk and have full time crews doing only their projects.Additionally you might want to use certain building materials but the county or city dictates higher end finishes to approve the site plan which add about 25 to 30 bucks a foot more to overall build costs.

Because I had said I was waiting on getting pre approved first because I thought I’d have 10 days window to shop all lenders without my credit being pulled and he said don’t worry about that, just go with a Mortgage Broker and they would shop for you and your credit would only be pulled once.

The first thing you need to get familiar with is HUD vs pre-HUD Homes and how to know the difference.