Complete detailed breakdown of work, itemized by area, broken out into material and labor - it has to be detailed it shoild clearly define what is and is not included.

Because I know my (narrowly-defined) market really really well.

I've got an accountant who has been encouraging me to maximize contributions to a defined benefit plan despite my goals to invest in real estate. 

Step two is then to define what your deal looks like, locations, price, size, condition.

Many accounts (401(k), 401(a), 403(b), 457, defined benefit, defined contribution, etc.) can be rolled over without tax or penalty to an SDIRA in order to access private investments, usually after separating from employment at the company that offered the plan (but not always).  

@Alireza Towhidi   before spending your money, try to go to some REIAs in your area, meet investors,  read some books and define your exit strategy,  flipping properties is different than wholesaling and buy for rent,  We do wholesaling in Gator Property Ventures but in order to get a good deal you will need to spend a lot of time,  

See the following chart found on page 3 ofIRS Publication 560- Retirement Plans for Small Businesses.When looking at the chart, look at the row labeled “Defined Contribution Plan” as a solo 401k plan falls under this umbrella.

I am currently working on defining my search criteria for an office building, and I am inclined to go with a mid to low-grade B property. 

everyone is newbies including myself, we assigned everyone a positions/role in order to function such as market analysis, accounting ect. i had suggested that we take some time to just learn the business, and educate ourselves before we even try to start making deals ect. we definitely have negotiate the divorce if it happens, that sometimes that has not been clearly defined yet. 

Comps are generally defined as sold within the last 6 months and located within 1/2 mile, similar style house, similar sq ft, etc.