But my lack of long term market understanding lead to over extension on my personal buy-and-hold properties. 2008 destroyed me as 95% of my tenants decided they no longer needed to pay... and some even decided that they were entitled to my mechanical systems and metal materials like plumbing and wiring... one even burned down a multi-family building.

Bigger Pockets is lacking in strong resources for real estate ventures that succeed.

I have tried a yellow letter campaign but didn't do alot because of a lack of money. 

Is the lack of insulation making the furnace work harder therefor expediting its demise (even though it's never known otherwise)?

We also target homes built 1990 or newer, as we are just more familiar with this construction, the issues, and hopefully lack of issues.I know there are a thousand way to invest in real estate, but these are my goals.

They often lack the experience, know how and skills that are necessary for a professional transaction.

I am a motivated individual that is tired of being disappointed at the lack of money I make at my 8-5 healthcare job.

The plus side of this is that is sounds like they aren't deferring maintenance due to a lack of funds - they are special assessing as needed. 

Many times a low appraisal is somewhat due to the appraiser's lack of knowledge of the area, but if it takes a very intimate knowledge of your immediate market to justify your price, you're probably going to run into the same problem with the next appraisal.

There are definitely comps in the area, just lack of consistency.I know there is always some level of risk but I'm trying to at least take on a manageable amount and be realistic about the sales price.Any advice for a first timer?