(Plus, in Virginia, you'll probably have more permit requirements than I have here in Texas - you may have to get a structural engineer sign-off on any substantial changes.)Can you insure it cost-effectively?

Would the city have to issue a permit? 

In those states where formal probate is required, the judge has tremendous powers and latitude to require payment, even in States where statutes do not require this.There is no such statute for secured creditors  in CA, for example, however I've watched judges rule requiring PR's to liquidate and satisfy rather than permit distribution (or sale) subject to.I've never had such a problem, however my attorneys are good a finessing cases through.

In my county, you can build on 75% of  your land, beyond that the county won't approve permits.

Are new lots for a trailer based homes being permitted in Austin?

This will permit you to create a first or borrow more money.Charge yourself low interest and good terms with a discount for early pay-off.Always have "first right of refusal" in the even note holder decides to sell the note at a discount, you will be in a position to benefit from that sale.Ask friends and family to deposit money in an interest escrow account for your use to purchase real estate - offer them an interest at a good rate, with a equity bonus when property is sold and optional give them an equity position in the property.Hope these ideas will help you.Charles Parrish 

I'm preparing to add two more units by splitting the main house which will require plans, permits, and financing...

 $9k for the plans and all the permit running and time at the city is about right.Ask me how I know this

If you  house has a "Vacant House Notice" You will need to get a "use and occupancy permit" (U&O) before you can rent it.

I have contacted the county health dept and they emailed a sketch included with the original septic permit.