But I can't seem to find any information about what are legal requirements for owners and property managers.

I could only imagine the legal agremeents needed on who has what right/easements etc.

The paint is chipped so I'm assuming there's lead paint and there will likely be asbestos and lead pipes for plumbing.

Do not rely on it for legal advice.

Also, if the triple is a legal multifamily, you will be able to use the other 2 vacant units at gross rent of 75% to lower your monthly mtg payment.

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.

I don't know your state but I suspect you would be breaking some law, as you are likely unable to legally market something you don't own or have use and possession rights.

I think I would probably talk to an attorney tbh these business purpose non regulated loans do not have rate locks that have to be honored legally.. they can and do change them unilaterally.. borrower accepts counters or declines and loan fails. 

Hi, I have converted 12 sfh to legal duplexes in oshawa.

We use carbon copy in letter size (legal size is just a pain).