The key is to expose yourself to as many different possible profitable avenues in real estate investing & then continue to narrow them down to a select few which would be a good match for your strengths & personality. 

Hi,I actually use the same lease on my condo rental that I use on my fourplex units and just fill in a few blanks differently (like what the rent covers, for example).The key difference for me is that I have an addendum of condo association rules and policies that is incorporated by reference in the lease. 

If we were to rent out the front house that we currently live in, I would estimate it to be about $3500 or more for it, since it was remodeled, and it looks great.Analysis:So I did the math (high level) using 2 different scenarios.Scenario 1: If both the houses were rented.Property/Deal ProfileGeneral GuidelinesPurchase Price700,0001 Percent Rule (%)0.857142857Down Payment (%)3.50%50 Percent Rule3000Down Payment ($)24500Cap Rate8.214857143Interest4%Cash-on-Cash Return26.73744578Term (years)30Loan amount687,321IncomeCash FlowRental Income 12500Total Monthly Income6000Rental Income 23500Total Monthly Expenses5075.33Laundry IncomeStorage IncomeMisc IncomeTotal Monthly Cash Flow924.67Total Monthly Income6,000Total Annual Cash Flow11096.04ExpensesCash-on-Cash ReturnTaxes750Down Payment24500Insurance58Closing Costs0Water/SewerRehab Budget30000GarbageMisc Other-13000ElectricGasTotal Investment41500HOA FeesLawn/SnowVacancy200Repairs200CapExProperty Mgmt.Mortgage Insurance Premium586.33Mortgage3281Total Monthly Expenses5,075.33Cash-on-Cash Return26.73744578 Based on the above analysis, here are the key takeaways – 1)The property cash flows - $924/month 2)Cash on cash return is 26% which is pretty good in LA I reckon.3)The main thing I would like to note is the solid Cap Rate of 8.2Scenario 2: The actual scenario with only one rental income since we moved into the front house.Property/Deal ProfileGeneral GuidelinesPurchase Price700,0001 Percent Rule (%)0.357142857Down Payment (%)3.50%50 Percent Rule1250Down Payment ($)24500Cap Rate2.214857143Interest4%Cash-on-Cash Return-74.46737349Term (years)30Loan Amount687321IncomeCash FlowRental Income 12500Total Monthly Income2500Rental Income 20Total Monthly Expenses5075.33Laundry IncomeStorage IncomeMisc IncomeTotal Monthly Cash Flow-2575.33Total Monthly Income2500Total Annual Cash Flow-30903.96ExpensesCash-on-Cash ReturnTaxes750Down Payment24500Insurance58Closing Costs0Water/SewerRehab Budget30000GarbageMisc Other-13000ElectricGasTotal Investment41500HOA FeesLawn/SnowVacancy200Repairs200CapExProperty Mgmt.Mortgage Insurance Premium586.33Mortgage3281Total Monthly Expenses5075.33Cash-on-Cash Return-74.46737349In the actual scenario, I am paying $2575 every month towards the house.

It's important to figure out what your business strategy is, and what your value-add proposition is.I know that folks have been successful in each one of these niches in Philly real estate, just depends on what you are looking to do (in no particular order and just off the top of my head, I'm sure that I'm leaving a bunch out): low-income rentals, luxury rentals, flips, vacant land speculation, new construction, section 8/PHA rentals, wholesaling, wholetailing, bird dogging, turn key sales, property management, construction management, financing expert, zoning expert, title expert, business procedure consulting, hard money lending, seller financing, buying subject-to, syndicating deals, 1031 exchange scout, retail sales, etc.Personally, I've set up a pretty decent rental portfolio over the last few years, that's what made sense for my investing goals and setup. 

But one thing I do know is that one key is scale. 24 units really?

It’s a great traffic driver for them, and it’s a great lead generator for me.

(I have a move in checklist if anyone is interested)Do you meet them to take return of the keys? 

The key here is the seller must provide a copy of the original note along with the LNA. 

And 36 Other Key Financial Measures". 

I imagine the best method to sell without breaking the lease or doing a "cash for keys" arrangement is to sell to another investor.