You would want to check local zoning to make sure you could build more than one as a lot goes into that beyond just being close to plumbing, electric, and gas.When you mention "a lot goes into that beyond just being close to plumbing, electric, and gas," what are the top things people tend to overlook when preparing to build ADUs?

The areas you specifically mentioned have seen growth due to those factors (Buckeye - industrial expansion; Surprise - TSMC plant relocated). 

Like Patrick mentioned, I’d say starting with a long-term rental might be a better first step.

For the most part its just health and safety items, which are items we should have remedied anyways.As someone else mentioned, biggest thing to avoid is having the house tagged as vacant which the city will do if it sits empty for too long (handful of months, grass not cut, etc).

So like Eric was mentioning if a development has a Mello Roos one would want to pay less for the lot all things being equal.. these bonds have interest rates attached to them and they can be paid off.

As I mentioned earlier, she was very enthusiastic and I was able to build great rapport with her because we actually have a mutual friend in that neighborhood.

I forgot to mention, it's meant to be turnkey so they manage it, and their split is 10% of gross income before all costs and debt service etc. 

I think the non-refundable fee is low based on the damage pets can do (not to mention tenants).

(Still awaiting Seller to confirm report it’s been done as she agreed to the inspectors recommendation but has mentioned she’s not replacing it) In additional to the foundation has shifted and need reconstructed due to a lot of slopping in the home (My agent said it comes with wear and tear, so they might argue that their not going to fix it so I didn’t put it on the IRSA to repair).

You can definitely integrate Zelle/Venmo into your systems but there's easier ways. 100% agree with this explanation BUT I think there is a sweet spot not mentioned.