As an US based investor, I find certain comfort in investing in Puerto Rico, which is a US Territory, but obviously since you are comparing your investments to international investments, you may be looking at things that I am not. 

Many are concerned about downpayments (as you mentioned), yet why not get your preapproval and ask the seller if he/she is comfortable with Seller Financing the Downpayment?

Certain organizations such as the AICPA and the State board that issues the CPA license mention what a CPA can / can't do to retain his / her license.Providing a comfort letter is an 'attest service'.Furthermore, CPA firms are encouraged to have insurance, which may mention that the firm can not provide comfort letters.What the mortgage company is looking to do is potentially have another person to go after if the mortgage goes south.It is not worth it to a CPA to get a few hundred dollars but potentially get a lot more in risk exposure.

Many investors buy distressed properties because they can get a better deal and do significant rehab work, but it sounds like that it outside your comfort zone.

However, these situations can be complicated, and it's to your benefit to have a realtor on your side (if you don't already) to help you negotiate and stay within the law.Your post was pretty general, which I appreciate, but I don't know if I handled all of the concerns someone in your shoes would have.

I think they would need to file the insurance claim if there was enough damage, but possibly they could escrow an amount you’re comfortable with if lender allows.

Fundamentally, I want a balance between an efficient, market-rate park and tenants who are happy and comfortable.

However, if the nearby high-risk area poses too great a threat to perceived safety and could potentially deter quality tenants or future buyers, it's probably too close for comfort.

Please share your experience if you are comfortable doing so.

What's at risk is it may not cash flow and renting is not so common in South Jersey, but I would feel more comfortable investing in a good area where schools are decent to good, and tenants are likely to care more.