We screen, including calling vet, charge a pet deposit and have rules in the lease about maintaining dog damage, flea/tick meds, and no disturbing the neighbors with barking.

As a general rule you should use an S-Corp for everyday business (flips) because of the tax advantage of the salary dividend split.  

When it comes to refinancing, do the same rules apply to qualify as far as providing tax documentation and pay stubs ?

A building from the 50's has all kinds of issues once you open up walls and spaces.No legal advice given.

The tenant may voluntarily agree to leave in exchange for a cash payment or some other benefit, but you cannot make her leave unless you were completely removing the building from the rental market under the Ellis Act (and I am not as familiar with those rules to know whether it would work here).So, with all of that said, if the deal depends on this tenant vacating the apartment (which, if she is paying $350/month rent, it probably does), then I would only move forward if the seller will agree to deliver the unit vacant at close of escrow, OR, if you can obtain a signed agreement with the tenant to move out for payment (and for that agreement to be upheld, the tenant should probably be represented by a lawyer).  

., you will have to give up 50% to 75% of the profits as the price of your education...but don't forget you're still getting paid for learning. 

Folloe the 2% rule which I love! 

Once you establish your REA license, you'll find that depending on who you broker with, that brokerage may have rules that will restrict you in doing some of the things you would want to do as a REI.  

Curious to hear responses on this, as it is a question I am debating too, before beginning to invest in the Columbus area.A nice rule of thumb I heard is that worse areas tend to have better cash flow potential but lower appreciation potential. 

The home rule only applies to Non Owner and 2nd homes.