Since the number of sales is so low and owners hold on as long as they can it will take a major market shift to start seeing comparables with the ADU variable. 

You start to take on more significant projects, renovating and flipping properties for higher returns.

I'm not a lawyer, and I'm not in your state, so take this with a grain of salt but-If "accepted an offer" means that you signed a legally binding contract that doesn't provide you with an out, then the short answer is no, you cannot legally cancel the sale. 

Can they prove how long it takes to rent a vacant property?

On a new build $275k is the sweet spot but if you go up to like $320 it better have a steep roof 9ft ceilings and curb appeal front or it will sit up to 90 days before selling.Its basically what most people can afford around here.I would take more of a data approach to this instead of guessing. in our market all new builds combined that sell on the open market is about $550k. we build between 350k and 500k. we also stay in line with where national tract builders build in our market which s 400-600k but we like under 500k in Columbus Ohio. in miami it's similar in suburban markets  

This is a great place to learn and to connect with people so take advantage of all the great resources.

Maybe find a draftsperson for a small job like this......you'll probably get out for under $100k total.I already have the guy taking care of the drawings.

However, you need to ask yourself is it worth it to take the time to learn how to use Quickbooks or other software?

Tenants wants to add new flooring and they take it out of the rent payment.How do you usually handle this?

But it certainly takes time (and costs add up too, with each skip and time spent on the phone with each prospect, or paid to VA to do it for you).