Apologies if I missed prior posts asking the same thingI want to take advantage of the low down payment requirement however need to find a lender supporting this loan type.Can you please provide any recommended lenders for Homestyle loans (or even 203k) that serve DFW? 

Have also used list source and prop stream before but the data they provide is very similar to what I pull off the tax records through CRS Tax. 

Finally, even as the landlords cash flow increases, depreciation should keep a major portion tax deferred. 

I assume your prop tax increased 1.1% to 1.2% of the ADU cost even though the ADU only valued at $75k???

When we looked at what his cashflow is currently, and then considered what he would net out of a sale post tax, he decided to keep owning the properties.

I have 2 options:- finance the construction pre-selling the apt, and take my profits (expected to be around 700K pre-tax); or- finance the construction with a 6-7%/year loan (collateral = my house), keep the 10 units, and once the building is completed in 24 months, rent them for circa 180K/ year gross.

I would recommend an STR for the best tax benefits and cash flow no doubt.

Be mindful of short-term capital gains tax, as profits from flips held for less than a year are taxed as ordinary income, and frequent flipping may result in self-employment taxes.While profits from flips do not qualify for 1031 exchanges (since flips are considered inventory, not investment properties), you can minimize your tax burden by deducting allowable expenses like renovation costs, loan interest, and holding expenses.If you're considering diversifying into rentals, explore opportunities to benefit from long-term tax advantages such as depreciation and lower long-term capital gains rates.

Having watched many prior co-workers get paid, cash their check at the casino, and promptly deposit it all into a slot machine I can tell you with pretty good certainty that casinos don't have a positive effect on disposable income and good use of the existing income in the area surrounding :)Are there solid local employers OTHER than the casino in a 15-minute drive? 

If you need financial help, ask under the "Finance, Tax, and Legal" forum.