Costs to put a beam to open the space between existing kitchen and LR?

Purchase price: $35,000 Cash invested: $25,000 2/1 on 3 lots = 0.35 acres in Lawn, Texas - population 353.Rehab budget $10,000Doing all cosmetic work myselfHouse pier & beam foundation leveledElectrical was already updatedplumbing was already updatedCentral air & Heat was also already presentTearing off porch currently to open up.

Impeccable tile work throughout home is showcased around gas fireplace & natural beam mantle. 4 season front porch with panoramic insulated windows.

If you plan on putting up a steel I-beam from wall to wall you might get away with no plans.

Contractor that we paid $7000 to jack the house stopped and wanted more money, I told him to leave, we can handle it (he didnt know ill do whatever is necessary, including jacking a 70 year old house with harbor freight bottle jacks to tear out main beams) I was there every day after work and every weekend putting in the sweat equity for months.

They recently put beams on it as it would not sell well earlier

The floor sags in certain places and this is due to to beam issues under the house. the beams have to be either replaced or repaired. the house is 1 story and about 1300 sq ft. how much would you guys say this would cost?

You will need to support the structure with beams and columns as you dig.  

They typically come out to laser-template within a few days, cut, and install about 5 days later, pretty quick turnaround. 

It's important to stay laser focused on the tasks at hand and on the things that you can control.