I don't know if you're asking about home use or business use. If it's home use, good luck for Ethernet. 25g is mostly a back-rev to price differentiate between 40G gear and 10G gear. It helps keep 40G gear prices propped up rather than having to lower prices. Kind of like how 10K and 15K spinners keep getting put in SANs to prop up Enterprise SSD prices. Because of that, 25g gear is often newer gen than some of the older 40g stuff, and you might find better prices on first gen 40G gear vs. first gen 25G gear, thought the prices for QSFP cables may eat away some of those saving.
With generous discounts, a Cisco 9300 with Smartnet and a quarter fill of 25G SFP cables will run somewhere around $35K. Your VAR can get better deals than that, but it's going to have to be bundled with a lot more than that.