Conversion Copywriting for three commercial landing pages

Hello, I need three commercial landing pages copywriting, I need just high quality copywriting for three commercial pages upto 8-10 sections each, My goal is copywriting should be very highly optimized so we get higher sales.

Problem is underlying product is completely same and even use case but to target different keywords for our SEO marketing we are creating three commercial pages but we don't want them to look similar or get penalized by google doorway pages or cannabilization issue, so if you have SEO & GEO knowledge that is a plus. We don't have any specific word count we just need upto 8-10 sections on each page and since it is commercial landing pages so it doesn't need those word counts and would be very less.

Please don't waste yours and mine time if you don't know what you are doing or am asking, I want you to do first deep research about topic, user pain point, and our market and most importantly avoid cannabilization issues without compromising usecase. How would you approach such page? My budget is $30 and I just neeed only conversion copywriting. Thanks!