How much time per day are you currently dry firing? How many centerfire rounds are you currently shooting per year (and what cartridges)? What's your current workout routine?
I think you need to be more focused on what you are actually "training", and better define your goals and associated timelines to reach those goals. If you want to work on building solid positions on the clock, a DFAT (or similar) and Triggercam will likely be a far better investment.
Dry fire is your skills acquisition, and can be used for, target acquisition, sight picture/sight alignment, NPA, controls manipulation (rifle, scope, tripod, etc), trigger control, positional build-and-break (bone support/muscle relaxation), developing/analyzing pre-fire & post-fire checklists, etc.
Buying a plinking/fun gun isn't training. If you want a plinking/fun gun, buy it - but you aren't training. The only thing different between dry fire and live fire is recoil. You can literally "train" everything other than recoil management/follow through at your house for free. You need to put in the time though. A new rifle or widget won't make you any better if you are not already putting in the time with what you have available.
