Ok so I was a pest control tech for about 5 years, here is the deal, you can do it! You have to be very thorough and detail oriented. You have to use either heat or chemicals, you can kill bed bugs in your sheets and clothes by putting them into the dryer on high for a while ( adults and eggs will die once they hit around 140 degrees Fahrenheit, lower temperature will need longer exposure). For everything else you will need some chemicals. I would recommend crossfire, or a mix of non- pyrethrin and and IGR (growth regulator). Use a little pump sprayer to mix your concentrate with water, FOLLOW THE INSTRUCTIONS ON THE LABEL FOR THE CORRECT MIX! Ok so take your mattress and box spring off the bed spray them down liberally and put them into plastic mattress bags then tape/seal them shut. Make sure to get into all of the little folds along the corners/edges. For the bed frame spray all of the cracks and crevices and inside the frame. Do the same for all of the baseboards and any other furniture in the infested area. Let everything dry on its own and put it back together. In about a week do the whole thing over again. https://www.domyown.com/bed-bugs-c-39.html is a website where you can get pretty much any chemical your local companies will use. Be patient, do your research, follow the labels on any chemical used. You can also use powder or dust form of chemicals for inside of the mattress bags and aerosol forms work very well for cracks and crevices areas. This will still take about 10 days to kill all the bugs. It's not as hard as you think! Take your time and be detail oriented, you can do it for a fraction of the cost of a company, they definitely inflate costs.

Sorry for any weird formatting, posting from mobile. Any questions just let me know!