I graduated with a Masters in Accounting a year ago but, the more I research I do on real estate the more interested I become.I was going to pursue my CPA, however, i’ve been considering a Real Estate License. 

@Michael Shea I'm not a tax accountant, but I've done the rent by room strategy for over 6 years as a house hacker, and I've recognized rent by room tenants rents in the Schedule E part of the tax return.

I don't want to change our software for accounting / management because I have another LLC that requires quickbooks. 

If you self manage, try to account for 5%-10% maintenance each month and 5%-10% vacancy. 

(Pmts to be deposited directly into sellers account monthly, per realtor.)

How many spaces per acre can be accommodated, and how much space does a single RV spot take up typically?

A great real estate metric to live by is the stabilized yield on cost which essentially takes into account the value added to your real estate once it is up and running/stabilized.

- My friend has a whole sale account for printing mailers for an excellent price however, I would have to mail them somehow.

My PM changed accountants and now I have to ask for this vs it automatically coming, but they still provide it. 

Remember conventional guidelines will hit you with all the expenses, added back depreciation but only provide you with 75% of the total rental income to account for vacancy.