You can START by reading textbooks on these three topics so you become familiar with the terminology and the concepts.What you’re asking is akin to : I want to become a surgeon.

I think not hiring a PM might be based on the following:1) How far you live from all your properties.2) If you have a very reliable handyman nearby your properties who can be a "point person" to asses issues when necessary.3) If you don't mind doing the advertising, interviewing and showing your properties when you have potential tenants.I have had 10 rentals until recently and I did all the PM work for 12 years.

I'd greatly appreciate any recommendations for a reliable property manager in the area.

I need a reliable virtual address and digital mail forwarding service that can handle digital mail forwarding, scanning, and other essential business needs.I’m looking for something flexible, secure, and cost-effective.

Just be careful who you partner with...be sure they are reliable, honest, experienced, and trustworthy.

You can find reliable lease agreement templates through legal platforms like Rocket Lawyer or LawDepot.

It is very difficult to find a reliable manager for renting by the room here.

@Alex P.Here's a few references to start that may help you to find the answer to your question: Treasury regulation §301.7701-(3)(b)(1)IRS Private Letter Rulings 9807013, 200732012 and 201216007If you need help finding these or interpreting them, as well as knowing how reliable they are for you to use for your own taxes, consult a tax professional. 

No matter how much detail you share here on the forum, we will not be able to give you a reliable estimate because a lot of factors can change the result.

Would you want the cheapest accountant or the cheapest wealth advisor or the cheapest surgeon?