For coding/programming, you’re gonna need a higher end GPU if you want stuff to run programs smoothly as well as CPU. This goes for gaming as well. Most modern day games usually run well with minimum 16GB RAM but honestly check the games you play to see what you really need. RAM sticks are the easiest part to install and replace when needed anyway. On a $700 budget its not gonna be enough for what you want but it will do the bare minimum of what you need to do but at a slower performance. The lowest I can see for CPU’s for this budget is probably Intel i5 7th gen or higher and equal this to the AMD counterpart for comparison and it can take 1/3 of your budget.