Security deposit amountYou can find plenty of examples by searching for "tenant estoppel certificate doc" or exchanging "doc" with "pdf" for more options.Here is an example and explanation: Sample EstoppelSome have a lot of legal jargon but this document does not need to be so detailed.

As a retired CPA, I have seen more than my share of bankrupted RE investors who were over leveraged with many properties.All the more reason to emphasize developing good due diligence practices, having some skin in the game and staying on top of legal requirements, maintenance, finance and tenant screening criteria.

Deposites are legally REFUNDABLE.What happens if your tenant changes their mind the day before MoveIn and leaves you with no time to find a new one?

The various "what-if" on neglect, just like with a tenant it's violation of contract terms and you take the applicable legal actions. 

they are a bunch of white collar criminals, I'm in the process of filing a complaint with the FBI about this company.

If you're adding an ADU you wont need to add in sprinklers but a legal expansion into a fourth unit would most certainly.

(census.gov)Now I am not sure how underreported illegal immigration is but I am going to hazard a guess that people go where  people of similar backgrounds are so immigrants legal or not are likely to follow the patterns you see on this map as many look for connections from their home country.

Quote from @Kevin Leslie: An LLC is useful for two things: anonymity and legal protection.

It’s extremely powerful to compound your earnings, which means you want to legally minimize or defer your tax payments as much as possible.

After paying closing costs, title fees, appraisal, origination, underwriting, processing, legal and other fees, the typical refinance costs about 1.75 - 2.5% of the loan amount just in closing costs (obviously before people yell at me, this varies drastically by state, but having done loans all over the country I find this to be a pretty accurate estimate).  2) Keeping the average 2% cost in mind and the fact that people typically refinance when rates drop about .75% - 1% or more, I wanted to see if paying an extra point now when I was already paying all the closing costs to buy the rate down made sense. 1 point can get you between .5% - .625% off the rate depending on the days pricing and the coupon you are pricing.