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1979 NACU 2bd mobile home.I basically have one concern ~ there is a open pipe on the roof, perhaps once used as plumbing vent (we are unsure where they've been rerouted).There was a nest inside, I poked and prodded, no softness, no mold or mildew within field of view.I'm just somewhat worried, it seems this pipe has been this way for a very long time, it crumbles to the touch.

Here are some recommendations for you:Find and connect with other BP members that are in your area: http://www.biggerpockets.com/meetSet up keyword alerts to be notified of the topics that interest you: http://www.biggerpockets.com/alertsRead Beginner’s Guide: http://www.biggerpockets.com/real-estate-investingCheck out BP Podcasts: http://www.biggerpockets.com/renewsblog/category/podcast/Wishing you the best!

Not all of us are bad but like every profession, there are those who fail due to lack of knowledge, lack of concern for the client, etc. 

If you get locked in under the market rents it will not only create a legacy of low returns for you, but it will also be an issue for future buyers.  100% you will not be able to do step type of rent increase to market, RAP just won't allow it.I understand your concerns about your tenant and that is something that you have to personally consider. 

Also, start on the "Ultimate Beginner's Guide" on biggerpockets.com.

If crime is your concern, find a neighborhood that is less dangerous and/or up-and-coming.

I am mostly concerned with getting property's tax situation, as well as any liens on the property.

I can see these concerns becoming issues if the tenants have been there for a while and 1.

I just have to be a contrarian here @Caleb Heimsoth  as Caleb states I cannot think of anything risker than remote rehab for beginners.. keep in mind the author is a very experienced real estate professional and what works for him simply is not germane for beginners I know they want to sell books on this site.. but I fear there is going to be some really sad people that try to do this and simply don't know what they don't know.. all to just save 5 to 10k  extra that a flipper that does all the work and takes all the risk makes bringing you a finished product.. you can lose 10 to 20k in a heart beat doing this if not more..