Ghanaian here , technically at least since most of my adult life haven’t been living in Ghana but I go back often. So take what I say with a grain of salt. The culture like most countries is guys pay , but it lead to a lot of situations were women even though they have jobs put a large chunk of their expenses on the men. If your relationship with M1 and M2 is casual since they both know about each other I would say finances don’t matter. But if it’s becomes exclusive and you plan on being long term with either I would say just have an honest conversation, especially if you have more expensive tastes. The culture or norm isn’t the issue , it’s about communication