The second ball valves may just need snugged a little ... that usually stops a leak from that location.The third looks like the joint below the valve is where the leak is/was.The first may just be the bleeder ... you may be able to snug it as well, but with that corrosion, I'm not sure.Those valves should have been checked shortly after installation (a few weeks) and then periodically as part of your annual, pre-heating season maintenance.

It is a great way to meet seasoned investors that may be able to send you in the right direction.Don't give up, stay positive and be persistent!  

has anyone purchased a season corporation and/or a business trade line?

Look at their rental calendars too, if the calendar is empty the rate may not be realistic What is the seasonality like?

Is there any seasoning restrictions or is that just for a buyer requiring a mortgage?

Iif you are starting out and have little to no funds, I'd go with borrowing as much as you can for as long as you can.If you are an intermediate investor has good cash flow generating, you may want to mix it up with some 30 yr amorts, and some 15 yr amorts.If you are a seasoned investor, maybe not acquiring as many new properties, looking to ratchet down a little, then maybe go all 15s. 

I work in a seasonal business and by closing some of my colleagues will be available to help me make repairs.

Is any seasoning required?

remind them who they work for - I been down this route many years ago - now as a seasoned investor - learn what to tell them - to get what you want - in the beginning, I took many names - and wrote many letters to their superiors - not trying to be a jerk!!  

Do any of you more seasoned investors that live in the area have any advice for me with getting started?