If you are as great if a DJ as you claim to be you should be able to charge a decent rate for gigs and have multiple gigs per week. Based on what you claim your talent level is it should be easy for you to make $500 per week DJing, that’s $2000 every month plus your retirement and social security, it should be easy for you to buy a new $400-$600 laptop which is all you need to DJ with, as long as you make smart choice with how you set up you household budget,You suggest I buy a new laptop. Both laptops are fine. What you didn't suggest is where the money is going to come from to buy it and you don't pay my bills.
I am only making these statements based on information you have provided over you years on this forum,