I think that mobile games are very popular right now, and it's cool that there are various outsourced studios that provide their game development services. If you want to know how much it costs to develop a quality mobile game, then I advise you to read the article https://ilogos.biz/how-much-does-it-cost-to-develop-a-mobile-game-simple-math/. This is a fairly simple calculation, but it's still useful to read about it.