Any tips to remove this epoxy?

Hi, I'm not sure I'm at the right place to post this question, if not please let know where I should post it. I want to partly open a wall in between the kitchen and dinning room. The opening will be about 80 inches wide. The current wall is 15 feet 3 inches wide, with a 29 inches opening (our current entry from dinning to kitchen). Current: Wall is 15 ' 3 " (including opening) | opening | ----------------------- Wall -------------------------------------------| 29 " New project: | opening | ------------- Wall ----------- | Opening # 2 |------| 29 " | Air returns within the wall | 80 " | 25" | This wall a load bearing wall. My basement is unfinished and I do see the "I" beam running from one end of the house to the other. The wall to partially open is above the basement, therefore at the ground level. My house has another floor above the 1st storey, being a 2-storey house. My wall is made of 2x6s. I do understand that I will need a beam in the 80 inch opening. My question: I got 2 opinions in regards to needing more support in the basement. One saying I do need more support and the other no I do not. Can anyone shed a light with their experiences ? Basically, for the case where I would put more support in the basement, it would be 2 metal posts, right underneath the new 2x6s studs (1st floor) holding the new horizontal beam. Therefore, in the basement, the distance in between the 2 metal posts would also be 80 inches. I would have to dig out the existing concrete for the new 2 metal posts, the opening in the concrete would roughly be about 3'x3'x8"(deep). Can anyone tell me, if the above (partial wall removal) is feasible without adding metal post in the basement? Your help would be greatly appreciated.

Ok I hope this doesn't sound silly. We are looking to purchase a house very soon it will probably be an older house and need quite a bit of work. A house we looked at will need completely gutted. I had originally thought to completely remove all of the existing drywall and with the help of my friends insulate and possibly have the wiring redone while the walls are out and afterwards hire a professional to do the drywall. Here is where I get scared. I never thought about lead paint. Having a child under 2 years old I want to be as safe as possible and with the houses age I am just assuming it is present. I contacted the EPA about disposal so ill leave that for another day. But could I simply remove all of the drywall using safety precautions and have it cleaned professionally or is there more to it then that? Everything in the house is going the floors the walls you name it. Is contamination afterwards something I should be concerned with? We will not be living in the house until it is finished but is this a big concern if I remove and dispose of the drywall mop vacuum and discard of everything in the house and then have it professionally cleaned before carpeting is done? Any information would be appreciated I just want to be as cautious as possible hopefully I am not over reacting.