Hey,
Yes Realtek doesn't play nice with Hexos and WiFi is not supported at all.
If you are looking for a PCIe NIC go with an Intel NIC, if you want to have 10Gbps, go with sth. Like an Intel X520 or X540 depending if you want SFP+(X520) or RJ45 (X540)
So you want parity pricing for your costs, what about parity pricing to support all of the developers cost of living, the price for HexOS is very reasonable. What you are asking for is unrealistic.