The usually are attracted by a food source and simply find a way into the structure nearby for shelter.

If not, then sometimes the best bet is to use sites like VRBO/HomeAway and Airbnb to attract these corporate guests. 

Another way you could attract attention is by offering a month (or two) of free rent to anyone who is approved and signs the lease by November 15th, for example.

I know...my gut says "don't do it".....my wallet says "hey dude its $$...she pays, but its late..but she pays"......I think the deal breaker is her rent is going up $500....AND she was late at the lower rent.....not a good combo....Another kicker....she wants to move in ASAP since she gave 30 days notice and that is up tomorrow....and she doesn't have a place yet....probably because other landlords turned her down :)Yeah....the more I type this, the more its a NO....

That is not attractive to dog owners.

I’m personally not attracted to Airbnb as a long term solution, I find it to be more work than your standard rental.

I am looking for 30+ unit buildings, but not getting anything attractive looking. 

My question is quite straight forward: How do I attract Investors for a Raw Land purchase?

Based on it being in a nice part of town, I'd suggest making attractive but inexpensive choices.  

But you could posit that ranch homes with a single story could be more attractive to an aging population and demand a premium.