I would not worry about making any actual investments until you are back stateside though, unless that is going to be a significant length of time

A teacher I used to have has 38 properties and all 10/15 year mortgages which all have break even cash flow which in turn lowers his taxes from his full time job. After the 10/15 years he refinances and pulls out as ...

That, and it won't be an arms length transaction anyway so that will probably exclude you from being eligible from some of the down payment assistance (DPA) programs or mortgage credit certificate (MCC). 

So I have three prospective tenants for my property in Philly who are interested in renting but one only needs a 6-month lease and the other two are fine with an annual lease. I was thinking of signing all of them int...

The OP was not asking about not declaring income for a 7 day period - the 7 day period refers to the AVERAGE length of stay - and most likely the total days rented far exceeds 14. 

Have her send you post dated cheques for the length of the lease (if that is legal where you are). 

What is your average length of stay? 

I spoke at great length with the actuary who helped designed these policies (Jason Konopik).

Commercial non residential is more Cap rate based (which we don't use) and lease contract based (terms N/NN/NNN; term length and remaining; etc).Action- as noted above, have your lease contracts reviewed by an attorney or Commercial broker. 

How's your turnover look and what are your lease lengths if you don't mind sharing.