Some states require that the deposit is placed in an interest bearing account.

Pat makes a good point regarding changing inerior flow and layouts of non laod bearing walls, etc.

Typically when you clean a carpet you are cleaning the surface of the fiber, and if the carpet is maintained properly this is sufficient, How ever a abused carpet will have soils, oils, urine ect. absorbed into the fiber, into the backing, into the padding and even into the subfloor. 

I imagine with a soil survey and a properly engineered foundation it should be possible to build.

Your option is to do some simplified in-house cost segregation and bear the risk of an IRS challenge to it.Q2.

For example, a skylight will look nice but it isn’t going to change the world so don’t knock down the bearing wall and rip up the roof because the $10k investment is not worth it.

However, we definitely like a complete set of plans so we know what we're dealing with in order to provide an accurate bid.Digging out a foundation for beams and footing differ greatly across soil types and foundation types, also being the most expensive part of the build, must be as accurate as possible to bid you a good price without change orders, or going back on the original price.

But what are your thoughts on using an interest bearing Money Market Account versus a simple checking account, or are there other account types that have more benefits for a Real Estate Investor? 

I think this goes w/o saying... but there are lots of people with various experience all over this site, so bear with me: if (anyone) thinks (s/he) is going to get Somerville rental rates, commercial rates, or ARV's in Lowell, (s/he) is gravely mistaken.

I would consider long term plans with the house, how prone your area is to soil movement, etc...