I would not worry about adequate power with the
BX24. The BX is obviously a smaller machine than the 2615 but I think size rather than power would be the real difference. I have a Kioti CK20 TLB that has less horsepower but bigger numbers generally than the
BX24 so I would not worry about the horsepower.
The BX shines as a mower so I cannot see why you would sell the BX in order to buy a mowing machine later. I agree that mowing 7 acres with a sixty inch mower might get old but you'd probably need to move up to 30hp to comfortably pull a 72 inch mower. You might even be able to pull a 8 or 10 foot gang of reel mowers with the
BX24 if it is really almost lawn like. It depends on the land.
I looked at the
BX23 before buying my tractor. Nothing bad you can say about the BX series. Nice tractors but be sure the small frame size and weight will be adequate for your jobs. Digging bowling ball size rocks and doing limited home landscaping would be no sweat for a
BX24. If you are routinely digging out bigger stumps or needing to dig deeper then you'll be frustrated. Likewise, using ground engaging tools like a box blade or plow would be an issue with the BX because of its light weight but not because of power.