How much to knock double doors into solid internal wall?

[BeerBaby]

No plumbing or electrical things to move. Might be load bearing, not sure. Standard internal stud wall 😁

Is it stud or solid?

Stud. House under 20 years old.

If it sounds hollow it is. There will be a frame with architrave around the doors. First, remove architrave and locate the frame. remove doors by removing the hinges and lifting off. Frame will need to be removed as it will stand 'proud' of the wall and you will need to plasterboard over the hole. Once frame removed, extend the stud walling over the hole and plasterboard the frame - get a plasterer to skim the plasterboard and decorate - all done.

You may want to stick a small dia screwdriver through the wall first - just to be sure its not loadbearing !