What do you consider inexpensive?
It would probably be cheapest to just run 3 lines to your office and use the 24port you already have frankly.
That said the netgear is probably the cheapest direct option:
https://www.amazon.com/NETGEAR-Ethernet-Unmanaged-Rackmount-Protection/dp/B075Q66RKF?th=1
If you can use SFP+ connections in your office instead of 10GbE connections this is a cheaper option:
Five-port desktop switch with one Gigabit Ethernet port and four SFP+ 10Gbps ports
mikrotik.com
It supports 2x RJ-45 10gb modules, you would need one for the ethernet run to your basement 10GbE switch:
MikroTik
Otherwise too many transceivers will over load it, you could get the 8 port switch that supports 4x 10gbe transceivers like
@tjjh89017 noted, but at $65/ea the netgear would be cheaper at that point.
Forgot to mention you can get cheap used enterprise stuff but its going to be loud AF, I assume thats a deal breaker?