Quickbooks allows for you to add multiple debit & credit cards/bank accounts associated with a company.

Someone like SunBelt, but there may be dozens like this company who regularly sell such businesses, works with consultants who have buyers looking for these businesses, and have experience with valuations.Does the business own the real estate or do they lease?

Do you need a title company for a deal you've already made on a small 2-4 unit multifamily?

It is extremely common for PM companies to accommodate for external contractors - as mentioned above, it is your property at the end of the day. 

Quote from @Gian Pazzia: For properties that small, you should budget $450 per property and use cost segregation software like the one below from a trusted brand that has been in business almost 25 years.

There are other cloud based self managed property management softwares that you could look into if you're looking for self management tools, but they are not free though.

REPS is tough to qualify for if you have a full time W-2-paying job or company outside of real estate.If you get trapped with PALs, consider utilizing 1231 gain in conjunction with long term rentals.Current year deductions are only great if you can use them now! 

I have seen big companies have no clue that they need MLO and NMLS to originate in certain states. 

It literally seems too good to be true, but a quote I remember seeing was that the credit card companies are willing to lose millions to make billions. 

Cold call developers in your market as well as companies that provide infrastructure work.