Would love to hear your feedback on pieces on any or all of it.

That does not mean all appraisals or all appraisers are bad.

I have a seller who wants to sell 3 duplexes at 140K each where I would buy outright... finance with a bank either separately or all together on a commercial loan and 2 duplexes at 25K down at 5.5% for twenty years where he wants to do a land contract.

However you can give home some or all the money back as an act of charity. 

Plus you would likely have to increase your hazard/fire policy premium, and it may also increase your property taxes if the assessor drives by and sees those nice panels.If their desire is to "go green" regardless of paying more money, many area utilities will offer customers the ability to purchase some or all of their electricity from renewable sources. 

Our plans include searching for and filling small holes and cavities with acoustical caulk, adding a layer of roxul safe and sound between joist, attaching resilient channeling, and finishing with a 5/8 in drywall layer. 

The risk is that, if this doesn't occur in time, the market itself will "sort out" the issues on its own and arrive at an equilibrium that is far from what most (or all) stakeholders would prefer.

If you house hack and stop having to pay for most or all of your own housing you will increase the amount you can save for the next place. 

That means if you can pay some or all of it back, pay interest only on the amount that is still withdrawn, and still have access to the entire line of credit until the withdrawal period expires, usually 10 years. 

I think we probably over improve in our market in CA, but we have been successful at the BRRRR and it is easy to force the equity, which we have to or all of our cash for the down would be stuck.