Owner builder investing

[David Maldonado]

Has anyone had experience being an owner builder and built from the ground up on vacant land while using cash or private funds to fund the entire project, and then get a mortgage (getting all money invested back) and repeat? I'm pretty much describing the BRRRR method using new construction.

I figured, why compete with everyone else on a house that's more than likely going to need a renovation and pay above asking price? have built ADUs, all in, for $85-$95 per square foot per unit. I have done extensive research on the permitting process and all soft costs associated with predevelopment costs.

I'm looking at $40k-$60k on predevelolment costs

$100-$150 per sq ft for construction build. There is land with all utilities included in my area under 300k and 1200 sq 4 bed 2 bath single family comps in the area go for around $700k.

i want to build a 1200 sq ft single family home, 1200 sq ft ADU, and a 500 Sq ft JADU.

one of my propertys has both a jadu and adu and it appraised a little over a million (would be worth around $550k without the units).

With the numbers I've ran, its a no-brainer to go owner build, but I haven't taken on something this big. Just would like to hear anyone's experience and thoughts on this.

Thanks!