Unlike corporations, where owners may be subject to double taxation (the corporation pays taxes on corporate net income and the owner pays on any dividend income they receive), the LLC itself does not get taxed.

You will report worldwide income on your resident tax return.You will also be required to file a non-resident tax return in the state that you have rental properties in.If you pay any tax in the non-resident state - you will receive a credit for taxes paid to other states on your resident tax return.

It was my impression he was very interested in doing the deal and I was excited to work with a flipper which in return I will receive valuable advice.

I've been using Excel religiously for years, so still on that. 

Between having minimal liability risk in my own personal activities, renting to only the very best tenants, having excellent independent tenant screening, long time property management relationships, adequate per property insurance coverage and tack on umbrella coverage as/if necessary, I am more than adequately covered.

We are in an excellent location but are outgrowing our townhouse.

@Maria LunaLink below is to a free excel spreadsheet template.

With her teachings, coupled by other education I've received on the subject, I've been able to invest in several MHs, and finally about 18 months ago a small MHP!  

If one overpays the state income tax, they receive a 1099-G the following year for the refund amount.

@Jim T. added some excellent practical pointers.