As for rent collection, bookkeeping, etc I recommend you go through some online demos of different products to see what works best for you.

I am not sure why is that but you have to be careful on what are the agreement on that contract.In this case, I would recommend to get involved with a investor friendly realtor who will help you as it could be many issues during the process as the titles are not clean in most cases and many variables have to be checked. 

@Alison CromwellIn order to obtain a flip loan with no consistent income history, the following steps need to be undertaken: create an impressive credit score, put aside more funds as a down payment, check out new methods of getting funding besides what is available from banks or other financial institutions, involve yourself in investments with toughened entrepreneurs, show how financially sound you are by doing things such as getting enough money into savings over time through frugal living habits or accumulating valuable assets that can be readily converted into cash when required among others like developing several stable sources of income or steadily growing one.

I would also recommend that they have sufficient 'skin in the game' IE additional down payment above and beyond just having lived there a while. 

I know it's a ton of information, but is there some sort of reference guide I can obtain that will guide me to the correct information I need to get started correctly so I don't get into legal trouble down the road?

I recommend doing massive due diligence if you are taking on the risk of trying remove a tenant and move in.

And does anyone know anyone or recommend an ADU contractor or appraiser in my area (90031). 

I can recommend a local attorney.

Hi all,Any recommendations for an excel spreadsheet calculator to analyse deals?

An asset protection lawyer would likely recommend a separate LLC for each rental property you own because this limits your liability in case of a lawsuit (usually to the holdings of that LLC).