As someone who has a rather small splinterlands collection as well, I feel like sometimes the game can be frustrating and not very rewarding (for example guild brawls when you face someone with much more CP). However, I still enjoy the game and have no plans of stopping.
Also, when you calculated the cost for a max silver summoner you did it in a non-optimal way. As of writing this the cheapest 1BCX General Sloan is 1.456. This value times 25 would be 36,4$. However, using the peakmonsters bulk buy feature you could get a 25BCX General Sloan for a bit cheaper.