You have that process confused with a 1031 exchange, in which gains would be rolled into the new property to remain tax free, but a primary residence is excluded from 1031 treatment.

Essentially "protecting" me while riding from Exchange Place station thru the Garfield Ave station and finally to West Side Ave station where I would park.

If I choose to do the 1031 exchange, can the new identified property, a vacation rental, be in titled in both my husband and my name jointly or would it only be able to be in my name only since it was a single member LLC? 

Your best bet is to network and find other investors to exchange contracts with.  

It was relatively easy since it was a 1031 exchange and I was able to pay cash.

If you had a million in assets and 6 months of reserves they might be able to do something.If I were you I would keep buying those smaller multifamily and once you have a few more you should be able to find a bank to do portfolio lending.You can always do an exchange later on and sell those smaller properties to trade up for a bigger property.

I now own my first apartment building, a 5 unit bought for cash (1031 exchange).

Another path would be to purchase a note yourself from an exchange like FCI and document every step of the way.

I know very little about what options I might have in that regard, or who would be a good person to deal with in order to find a suitable property/situation for an exchange.                                         

Private money usually has fewer fees and points and term length can be negotiated more easily to serve the best interest of both parties.Private lenders will lend you cash to buy property in exchange for a specific interest rate.