Hi,I'm a Security Engineer by day and looking to learn more about real estate investing.

Their wife’s trust fund is the “real” buyer.5.

There is a lot of money in DFW and there are a lot of real estate meetup there, aka REA's, REI meetups. 

Short answer is as little as possible.The long answer is it depends on the deal.Typically you end up in a subject 2 situation when the current owner has little or no equity in the property, the current advantage of subject 2 properties is that most mortgages are below current market rates.Keep in mind when acquiring a property subject 2, in most instances you are not notifying the current lender of the change in ownership, and most if not all mortgages have a due on sale clause, which is the lender's decision if they want to enforce it or not.I personally like the idea its a great way to get investment properties with low rate loans, that with most likely appreciate in the coming years.

For example, adding a bathroom can increase your home's value by 10-20%, depending on the quality and type of bathroom.

@Mateusz SkibaRecommend exploring as many sources as possible to get referrals AND cross-reference them to get as much accurate information as possible.Check out NARPM.com, BP’s Property Manager Finder (BiggerPockets: The Real Estate Investing Social Network), etc.Also, encourage you to learn from the mistakes of others - by reading posts here on BiggerPockets about owners not having their expectations met by their current Property Management Company.

Columbus has ranked on the top 10 markets that outline that for the past 6 months at least. the best place to buy new builds is in higher priceopint markets but where the costs haven't gotten out of control. besides that I'd recommend working with a vertically integrated land development, real estate development, and new construction firm or design build firm who also understands market conditions. 

It's really going to depend on what you're needing in your new business.

@Cathy LiRecommend exploring as many sources as possible to get referrals AND cross-reference them to get as much accurate information as possible.Check out NARPM.com, BP’s Property Manager Finder (BiggerPockets: The Real Estate Investing Social Network), etc.Also, encourage you to learn from the mistakes of others - by reading posts here on BiggerPockets about owners not having their expectations met by their current Property Management Company.

I've read Michael Blank's book: Financial Freedom with Real Estate Investing and have started to do some research on markets I want to invest in.