If your using financing the bank requires this.

When it comes to property type, SFHs typically have higher appreciation potential but require more maintenance, while condos and townhouses can offer good cash flow and lower upkeep.

Most corporate relocations and temporary medical workers require smaller units.

Because at one point you do have to pay it back.This being said, utilizing a tax strategy requires planning.

Leveraged properties require patience even if your tenants pay on time and maintenance is limited.

Some don’t report their off-market business like FSBO sales for MLS stats as it’s not required and many don’t care about stats.

Talk to a few F&F lenders about % of ownership requirements to be the guarantor, and if there's a % of ownership which REQUIRES you to be a guarantor on the loan. you can avoid this headache by being strategic as to how the loan (and the LLC) is structured while you wait for your scores to improve again. 

Moving out of state, moving closer to work, school or moving into a bigger home due to expanding family like "pregnant" and/or requiring additional rooms or larger GLA.If you purchase a 2-4 unit and try to purchase another 2-4 unit if they are not "Common" to the area you will have a hard time.

You’d require a license for both of those.

My friend has a property but I think he is unsure about the STR regulations/requirement and that's why he is not considering STR arbitrage, but would be open to MTR.