Maybe a high interest bearing account, stocks, or something along those lines?

So it seems that the buyer bears all the risk of rising interest rates.

What you described as a reason to not enter the market now (or anytime for that matter) has no bearing if you understand how money works, and what true cost is to the investor. 

But that is me and how I valued my time when I was flipping with outside investors.I revert back to my initial comment, that if you goal is to grow, offering up a structure that allows you to do that may be a bigger priority, but scaling up means more work, and since you seem to be bearing the brunt of the work, I would make sure you are gaining the financial incentives for your work.

Just go for it, especially if your boss will bear the expense.

What are finishes going to be? Are

You'll also realize higher returns in lower-class neighborhoods, but bear the risk of theft, damages, etc.The more value you bring to a community, the more return you will receive.

Your OpEx have no bearing on the number.I agree with @Brad Bellstedt that GRM isn't very important.

Prefer to have no load bearing pillars if we can avoid them without too much more cost.We have soil and elevations from site survey just passed to us by the seller so shouldn't be a problem, but we still have to select our civil (should be by end of the week).As per insulation requirements would we have to ask the county or how would we figure that out?

Different type of contamination.