Just my $0.02 here but I would highly suggest either a Pioneer RT-707 or RT-701 (no reverse play) and they are built like TANKS!
The best investment for your $ for a 7" reel to reel tape deck and can be had at a very reasonable price (money wise). Easy to use and easy maintenance and parts are still readily available.
The only other 7" reel to reel tape deck that I would recommend would be a Technics 777 that is only if you are willing to spend big $$$ for one.
Never have actually had one, would like one, but way to costly for me. Though I strongly suspect that if they are built anything like the larger 10" Technics RS- series tape decks then I'd bet money that it is right up there (maybe even better?) with the Pioneer RT-707 class.
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Currently there is one for sale on Ebay but the price!!!!!
https://www.ebay.com/itm/1653823643...MIyfHu9ubz9gIV0zY4Ch37ewAOEAQYBSABEgJUNvD_BwE
Lastly.....stay away from Akai 7" reel to reel tape decks.