I'm looking at a duplex property in North Philly and the ground floor footprint is significantly larger than the top floor, so I'm hoping to move the second floor apt kitchen and bathroom adding space for another bedr...

If you only have a few hours a day to conduct business, it's not impossible, but you're going to spend more money on licensing and training than you'll generate in business.

We paid them a fair price for their property and conducted the transaction in such a way that was a win win for each of us. 

If you conduct the wholesale of real estate in this model of acquire, then resell, you eliminate the risk of running afoul of the law.

My lease states that no business will be conducted out of my properties.It's a no for me

The first question most Lenders will want to know is do you have any ground up construction experience or any experience with extensive rehab budgets. 

When these new investors explode here, usually with something like an SFR that's 40-60 years old, they say nothing about roof design, basement wall construction, beam placement, site slope, drain extensions, none of the things they should obviously be thinking about in buy a property they intend to hold 20+ years.

(Semi long post incoming.TL;DR I have an opportunity to rehab several trailers in a trailer park that need extensive work, is it worth it?)

Hey this is an old post but, id skip trace the address then conduct a ringless voicemail drop and see who responds.

After a few deals and extensive research you will be able to determine ARV pretty quick.