We have rentals in several different markets and haven't really seen any industry wide standards regarding vacancy fill times and lease up fees.

I buy double wides on their own land (not in parks).  

First you should be reading and learning anything you can about what you want to do, about the area you wish to invest, and really have a wide outlook on your plans so you can piviot when it is needed.

In terms of finding properties, it has its positives (most widely-used site) and negatives (harder to find "deals" here because the site is over searched with a lot of traffic).

Your income varies widely.

How much do rents typically compress and how wide will cap rates get before you want to start deploying capital in the east bay?

She ultimately went in a completely different direction...literally-the addition is now out the side which maxed out 16' wide. 

I would be surprised if you found many rehabbers in boston that troll this site looking for a lender.. or at least that would meet your requirements I suspect you already have those targeted and like  most of us in the business today we spend most of our time supporting KNOWN players to us.. instead of trying to cast a huge wide net and or train newer folks.

I've actually got a real estate license here in Texas (Home Team of America) that I only use for my personal investments and to help out friends/family.I'm wide open to meet folks, add value to the conversation where I can, and soak up information like a sponge.I'd love to chat/network with other investors in SA who're actually doing deals (not kicking the tires).

As far as lenders go, I have a wide variety that I work with again basing who I refer off the deal and strategy the investor wants to use.