there are too many variables in pricing construction to rely on an app.I currently just use a simple spreadsheet.I belive there is rehab estimating software, but you really need to know your costs and look at the software as nothing more than providing you an outline and you fill in the info.

They are considered revolving credit accounts, and are variable interest rate loans. 

To get true numbers one also needs to add in the costs of obtaining proper zoning which is even more variable and depends greatly on the political skill of the developer.It is also going to depend on what kind of community (or planned residential development - my preferred term) the developer is planning because that will affect density.Like I said, this is complicated, which is why many in our industry rightly avoid development.

And this is by using only four features (input variables) for the model: living area, year built, and location (longitude and latitude). 

leveraging track record is the key... without the track record it's a bit difficult to get the syndicator and therefore it's a bit hard to raise the money with this peace of the variable missing... in the equation.Note... i also managed to crack the right hand side of the equation and was able to find real estate investors by simply making them come to me.  

Fix those variables first (for a given market and property type) and then analyze deals.I recommend reading What Every Real Estate Investor Needs to Know About Cash Flow...

Easy to install and nearly indestructible, water proof etcCan get variable qualities from <$1/sq ft to $4+/sq ft....Ive done the HD Lifeproof stuff in two house....easy to installTile is great too but more $$ for the labor install

The time line between these two stages can depend on so many variables.

But here's what I can share:1) There is a ~$100k asset minimum (give or take) needed in your account in order to do this.2) This can't be with an electronic/self-managed brokerage account; it must be held with an investment professional3) Like a credit card or HELOC, there is a minimum monthly payment, but there is no fixed amount or term.4) The rate is variable, changing daily, but right now I am paying about 6.5% with the current interest rate environment.5) You cannot borrow against the full value of your portfolio, just a pre-determined percentage of it.

Living expenses etc are less variable, and can be economized if they become a problem.So the question becomes what's a reasonable debt service proportion of income?