Many parks cut out external investors and trap the residents who own their homes.  

The majority of the time cracking and deflection is a symptom of external issues happening around the property.

I think an important corollary to what you're saying is to be confident in your ability to implement your strategy, or abandon it altogether and change course if needed due to external factors. 

For this reason, many of the REI CRMs is based on Podio.2) An external reason.

Unfortunately neither my CPA or my attorney (both of which are very good) have experience yet in this area so looking for external help.

If I can find a SFH deal that is on par with TH, then I would certainly go for it - but I would not skip a TH just because of HOA concerns, nor would I skip a SFH due to lawn care and external maintenance concerns...

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There are some pesky rules here about posting external links otherwise it would've been too easy for me to just post that here for you. 

So we work with our tenants and try to help them out to avoid the harsher penalties the lease calls for.  

I've found that might be a little too much, but I'm not inclined to change it right now. 6% might be pretty much on target, but it does depend on the location (some areas simply have harsher conditions and also might be more expensive for repairs) and the age and condition of the property.