Or I contractor gives me a quote for a full system replacement, when 3 others said it just needs a repair..  

Not guaranteed, but my guess is they are getting a full check. - After hurricane Katrina squatters were a major problem.

I may give that a try as most of the leads are willing to accept offers in that range just nothing that would constitute a full rehab.Thanks!

They have a newsletter full of content that you can customize with your contact info, and print off and distribute.Then, I would pick an area that you want to farm. start small, and add additional sections as money becomes available.If you are really eager, and ready to work for it, print off the most recent comps of your farm area (or the newsletter as mentioned above), and go walk the neighborhood. 

I'm new to to Bigger Pockets community and I'm interested in pursuing real estate on a full time basis eventually!

You can still do a full background check on your renters.It sounds like you have essentially made a duplex out of a SFH.  

I'm always amazed at how creative folks are in crafting offers for services that required a full-time employee just 20 years ago!

Don't wait.(6) If you should need to return anything less than the full SD amount, itemize your deductions for the tenant (you may have to do this in writing by law.)

All FSBO sites are overpriced, Craigslist full of scammers.

I agree each property will have components of different age, but doesn't their estimate assume the best case of brand new components with a full remaining life?