GTM Plan and Marketing Budget Strategy for SaaS Subscription Model

Hey all, in the middle of formalising a GTM plan for the next 12-18 mths. Starting out bootstrapping with an approximate $10k marketing budget but with a hope of growing that to $200k budget in the next 6 mths. It is a Saas subscription model that starts at $299 pm but should prove to be a sticky product. Open to hearing any suggestions on how to grow this to see if there is anything I haven't covered and ideas I could include