I'm not clear on that relationship) performs the materials sourcing and labor sourcing (i.e. subcontracting) which usually fall under the care of a license/bonded/insured GC in order to circumvent the limits that are placed on unlicensed owner-builders. 

Requirements for becoming a lender will vary from state to state, but at minimum, whomever operates/manages the company will likely have to meet industry experience requirements and will need to meet capital/bonding/licensing requirements specific to Texas.

Mortgage bonds have multiple alternatives they weigh against.

My wife was raised to only put money in CDs or savings bonds. 

Sharing some info from two sources this weekRegarding states looking to strengthen seller financing licensing requirements and court decisions for those not licensed:First from Facebook group school of sharks:Hey guys,TX Dept of Savings and Mortgage Lending has some new rules that are expected to go into effect January 01st, 2025.

Engelo Rumora, you can get up to 8% with Corporate Bonds and 12% with Covered Call ETF's. 

Then getting legal requires Liability Insurance, Bond, Workers Comp , Etc.If you do all this, you will probably lose money the first few years while you learn the ropes....but after that you can expect to make about 20% for Overhead And Profit .

I would put that extra 100k in CD's, bonds and an s & p index fund and continue to add to it. 

I tried to tag @Steven Bond and @Michael Biggs  in the original response as well!

There are some bond programs both county and state level that you can get the downpayment and some closing costs paid or go new construction and do the same via the builder.