Ok, how about a multi-function box....
I will tell you how I've done Internet in this RV over the last dozen years.
I started with a LINKSYS Wireless game adapter (no longer made) which is kind of like a Wi-Fi "Modem" That is it connects to the HOST Wi-Fi but looks to stuff in my RV like a Cable Modem.. It fed a Common home router.. I've had 3 different makes.. I do not recommend Belkin (Which I'm using now) but frankly there is nothing wrong with 'em.
Recently,, I ordered an Umibuqitty Nano Station Loco M-2 (Just google Nanostation M2) I got the cheap one.. I suggest a better one, IT replaces the Linksys with only a couple of changes (Power is way easier to feed it,, that's the biggest change,, Plus a bit of "learning")
Setting it up takes a bit, since the docs suck, but I got it done.. Now where I am now I'm a bit far from the park router for the M-2 "The M might make it)
They have devices that can see for several miles provided a like device is at the other end of the link.. Less with common house routers
The path
Host ))))) Nano-station ====(Cat-5 I have 100')===Belkin router )))) Stuff in RV (Also cat-5 to some stuff)
Setting up
Access your router's config page, Set to static IP 192.168.1.anything between 1 and 255 EXCEPT 20.. (NOTE this i9s the WAN IP, not the LAN IP)
Go to 192.168.1.20 (The Nano-station) Override the security warning and log in (Ubnt is both user name and password) Go to WIRELESS
Click on SELECT next to the access point.. choose the one you want.
Click on LOCK TO AP
If a pre-shared key is needed enter it in the box near the bottom of the page under Security Type.
Click on CHANGE (Very bottom)
Click on APPLY (very top)
Click on MAIN.. You may need to re-laod a couple times for it to re-load.
You shoudl see a signal bar, If needed you can adjust the antenna direction a bit to make the bar stronger.
Now go back to your router config and select DYNAMIC IP
And that.. Should be.. That.
Home was where I park it. but alas the.
2005 Damon Intruder 377 Alas declared a total loss
after a semi "nicked" it. Still have the radios
Kenwood TS-2000, ICOM ID-5100, ID-51A+2, ID-880 REF030C most times