20 townhomes sounds like it would be sales, but I don't like to assume. 

Are you basing this solely on what you can afford, or what you intend to make on it, or your target sale price? 

Securing funding has been challenging, particularly because my business documents reflect low revenue from only one duplex, and I am currently between jobs.I have identified a reasonably priced piece of land and have saved a small portion of the funds from my duplex sale to invest in this venture.

I'm going to get with the sales rep and look into this further to see if there's any other option available or if we can make a referral to a local agent in your area that might be better positioned to assist.

Your net gain is your net sale, minus your adjust cost basis.

Sale your current house.  

I graduated from college in May, and I am currently doing business development (sales) for a property management company while studying for my RE license.

You don't mention if that's the case, but I thought I'd bring it up.You also won't be able to recognize any loss on the sale if that's the case.

These props were in good areas so I am guessing that is why. keep in mind true A class areas whould see majority of comps being sales to homeowners NOT investors.. homeowners dont care what the cash flow is or the potential rental income is only investors do..

A great thing about my team is we handle the sale and property management side for investors!