I may just walk away from the deal but want to at least try. 

I am trying to decide which marketing methods walk be best.

There are rules you will need to follow and you may need to work with an architect as well to walk through your vision.

Shoveling walks isnt any cheaper than the plowing , because the truck is there , you pay for the truck and driver . 

There are tons of things going on in the background though and trust me anyone who has tried to sell restricted stock will tell you its no cake walk which is why people generally pay less for restricted shares than freely tradeable shares 

The seller is willing to walk away with $1,000 net, and I'm pretty confident I can sell the lot for ~$30,000 -- So it's a pretty solid deal so far.

It's a 5 BR, 3 bath located near public transportation with easy access to center city Philadelphia, it's also within walking distance to a college and medical school.

. * if I decide to go this route, I would need a realtor who 1) knows Tampa well, 2) who works with investors, 3) has lots of hustle and is responsive, but also has a HIGH level of integrity, 4) who listens well and doesn't waste their client's time showing them properties they know are higher than the client's price range, AND 5) has patience to walk a client through a deal where the client has an extremely demanding job.

I have already performed my cash flow analysis and intend on walking inside and outside of the properties in the next 10 days. 

It is less likely someone is going to offer their services for free in terms of the time to do a walk through and cost estimate unless there's some incentive for them.