In the US, the tax treatment of passive rental income can be significant and if the US doesn't have a tax treaty with Singapore -- then you may also face steep double taxation on income from both sides.

Although I am assuming it would still be subject to inheritance tax at each distribution.

Eric Lesser – Bill S.1553 An Act Relative to the Regulation and Taxation of Transient Accommodations in the Commonwealth

In the case of an expired entity the court will sometimes allow you to serve the Dept. of Assessments and Taxation, make a serve by publication in the courthouse, etc.

$150 hoa. 2.4% property tax at least.

Whether the properties are in an LLC or your own name does not change your taxation.

There have been some recent changes in the law that seem to accommodate reorganization without taxation, but make sure you set up your transaction correctly from start to finish.https://cre.nerej.com/important-changes-new-hampshires-transfer-tax-creates-opportunity/  

Recently, I've started to do some research on different entities (S-Corps, LLCs, etc) in order to potentially minimize taxation on our profits.Based on my research (from a tax standpoint), I don't understand what the benefit of an LLC is (S-Corp elected or not) versus using no entity at all. 

Yes, I would find a good CPA who not only understands real estate taxation, but can also advise you on the proper ways to fund the retirement accounts as a self employed individual.

Totally different rules including business license, taxation and liability.Frankly - - I see this as an opportunity anywhere.