@Matthew Gentile  one main factor to remember Income is critical in this business to obtain financing of any magnitude and a stable well paying W 2 allows you to obtain debt for your RE purchases plus if you have health bene's etc that's critical as your family grows.

@Austin JamesUnderstand the area, the current tenant base,the median income, is it in a flood zone, the age of the asset, the condition of the plumbing, the electrical wiring, the fuseboxes, the age of the roofs, the age of the mechanicals, the condition of the foundation, the drainage of the property, does the property have a C of O, is there ny environmental concerns such as oil tanks being buried, the current property management company, what are the amenities.These are just a few things to look out for.

Listed some of the tax benefits you can receive while building an ADU and once the ADU is built from my research. 

Right now I think it’s a good idea so we can claim the rental revenue as income. 

My experience is that condo associations typically charge so much in monthly HOA fees that any potential investment income gets eaten up by that fee.

With properties rented out and mortgages covered at minimum, I will be able to save 8k/month.First property I have a year long lease in place and that cash flows about $200/month (expenses $1450, income $1675).

If you have limited income, these situations can be difficult to maintain.  

Meaning, they will take the lesser of the two rental income figures to qualify your DSCR.

Oddly, foreign national loans are very efficient as there is often limited income and employment verification. 

Depending on qualifying income you can go up to 90% LTV or most attractive terms will be 80% of the value or below.