Even if you bought the cheapest starter kit available, you will still need to buy more materials to build the frame. on top of that you will need to make improvements and tweaks to gain improvements in functionality and accuracy. However, your use case doesnt seem to support the need for those improvements over stock (which is still pretty good). given what you are trying to do, a traditional maslow running webcontrol with holey calibration should suffice. it looks like the closest thing to the original Maslow kit is the “Maslow CNC Basic Bundle” that MakerMade sells. you will still need to buy a router and bits too. no matter what option you choose, there is going to be more money to spend on top of that. dont forget the material lost due to training and ferreting out feeds and speeds.
if you are looking to do this to save a few hundred bucks now then its probably not the best solution. saving money over time, maybe. im just now getting to the point of proficiency where i can build high quality prototypes of projects. ill do small one-offs with it for shop projects. however i still go to a professional cabinet shop to have anything going to a customer cut. i cant beat his labor rates and material costs. The guy is awesome. Maslow has been good for me to learn what considerations to make when designing things which makes his job 100 times easier.