Personally I would hire a local geologist or civil engineer that specializes in wet basements (this will be a small local one office firm) and pay them to come tell you what the problem is.

Be sure to check out the meetup hosted by @Chad Clanton on the first Tuesday of every month (San Antonio Real Estate Investors Discussion Group).

I don't know what it may run in your area but there are firms here in KC that will do foundation inspections for around $300-$350.

If you need more help, it's worth going with a bigger firm. 

I cant help you in Philly, but on the 23rd in Pittsburgh, I am hosting Robyn Thompson for a free all day Flippin the Burg seminar sponsored by my REIA. 

He hosted easter egg hunts, barbeques, and other events. 

Also, be prepared to be firm and resolute with tenants, when necessary and appropriate.

However, last week my tenant in Placentia, CA (SoCal) put in her 30-day notice, so now for the first time ever, I need to find a new tenant.I'd prefer not to hire a property management firm to find my next tenant, as 1) I want to learn how to find a good tenant, 2) this is a nice town-home in a good community, and 3) I don't have a ton of properties, and this would be a fairly small project.But there are still a few questions I don't know the answer to:a) The only way I can think of to find tenants is to post on Craigslist.

Be swift, firm, fair and polite. 

Hosting suggestions?