What is the best for signing leases online?

I know in many areas that have laws about this, if you have attempted to get your landlord to fix a problem and they do not within a reasonable time-frame, you are legally allowed to pay someone to come and fix it and then deduct the cost from the rent.

I have a link to a national online interactive map that overlaps with the QOZ areas.

I know I need to establish a legal contract to use when gaining a deal to wholesale.

I have an appointment with JAG next week to work out the legal issues in order to cover myself just in case there may be an issue in which your speaking of. 

As you said, you have no legal claim to the property so you actually have legal rights to file a memorandum since you have no interest.

@Jason Ma Broker reports (they leverage and pay for databases), market research (online sources, personal network) and conversations with other investors/lenders/brokers/property managers.

We have a legal 2-family house under contract in Roxborough, Philadelphia.

The legal agreement you will have with them as the new owner will be what you have to honor - that should give the terms upon which you can cancel the lease or when it will expire and you can choose to renew it.  

We are wanting to get this place brought up to the current times and try to automate payments and accept them online.