Open Question: How can I repair my door knob that won't work?!?

I'm friendly with some people who want houses built and a lot of real estate agents who sell vacant lots and houses that are rebuilt. I'm friendly with a few builders also.

I want to set up the home buyer with the right builder or when my real estate friends sell a home have them recomend one of my builder friends. Of course I'd want some consideration. I don't know if it's a percentage or how it works.

I don't know a lot (anything) about construction but I learn quickly and one of the builders invited me to his sites and offered to show the ropes. Eventually when I'm more knowledgeable I'd like to hold the home buyers' hand from concept to fruition.
This doesn't quite seem like a construction manager or a general contractor... or is it?

My question/s: What's the title of the guy that brings the builder and the home buyer together? What's his cut? What books can I read and what steps do I take? If I start a business what does my business model look like?

Open Question: Estimate Question?

I wasn't specific with details in my last question, sorry :(

We are looking at building this home : http://www.architecturaldesigns.com/house-plan-6520rf.asp

or something similar. We are building it on or near where a house currently is, but the house is being torn down. Hookups are all there, most will not need to be updated.

We have a licensed plumber at our disposal, and people who have worked in construction who will do our drywall , painting, cabinets, floors, etc for us.

For this home, which is 1800 sqft, how much are we looking at, for foundation, and the basics of the home? Frame, gyprock,( I think thats what it is called), roof etc.

We would be getting a mortgage/loan to build the house. We would have around 20,000 of our own money to put into the house from the sale of our current home.

Thanks so much for replies. We really need this info as we are trying to figure out if we will go with stickbuilt or prefab.

Open Question: How can I repair my door knob that won't work?!?

My front door is not opening! The knob just keeps turning & turning until I've practically screqed the knob off. I don't want to pay to get it fixed, so does anyone know what the problem might be & how I could fix it? My home is very old- built in 1927- so that be part of the issue. The knob is glass and looks old too (I don't know if it's original).

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