If you have a small multifamily (let’s say 4-family apartment) that has a main common entry door into the building, are you supposed to change the lock whenever any tenant moves and then give all the tenants the new key?

Regarding the mortgage terms, you could either get a flexible loan (not very common) or a 5 year fixed mortgage to reduce the penalty (Vorfälligkeitsentschädigung) when selling the property before the loan ends.

I've been at the same job for 3 years now and in the same industry for about 12 years.I do live in the house I own, As far as the HELOC, that was kind of my plan to utilize that as a down payment...ive been reading about the DSCR loans, why do you say I wouldn't be ready for that as a first timer?

There were damages and loss of rent.One of the local utility companies verified there was no transfer of service.

It can vary WIDELY between lenders some times with this type of lending.Some other common differences between the two loans:Appraisals – Conventional loans will always go off of “sold comparable properties” (or comps).

She is currently locked into a lease, but she will be $900 short on rent this month and she says it is getting harder to pay every month.The rising cost of pretty much everything is straining budgets, especially of your working tenants.I see "it is getting harder to pay every month" becoming more common. 

Unfortunately, he made the common mistake of thinking he could borrow his way to wealth.

It is the most common way to achieve the returns sought by the LPs.  

Wholesaling is a super common point of entry and with your mind wide open, motivation, and dedication I present this...  

I've read up on local (Massachusetts) law/guidelines regarding utilization of security deposit but it's pretty vague in this regard.