My base is is Albania, so kinda there. I think you think I am inexperienced, and that is why I don't want challenge, but I finished TFTD when I was a kid and did not speak english, alnong with every clone I got my hands on, so I know how to play it, I just don't find combat fun anymore. What I do like is a story, cool gadgets, enemy factions, mission types, etc. of THIS mod. In short, i love this mod DESPITE the game.
Anyhow, starting over isn't really on the table, as I spent considerable time on this, and replaying it would just be wasting it. I might cheat and remove the warning once. I have 2 more bases in construction anyway, so maybe it is salvageable.
I threw in a save if someone needs it, for some reason, not sure.
I took a look at your save, and I'd recommend a restart, though you can recover in X-Com from almost any setback. Definitely take a break if you need to -- I usually take a 1 year break between coming back to X-Com.
You absolutely need multiple bases in this game, and you'll want them early. There is just too much to research and too much to manufacture to get through without them. Note that you don't need to keep a full complement in each base -- just hangers, storage, living quarters, gym, and 10 soldiers to handle the easy stuff. Keep an extra hanger open at smaller bases. You can load up the Osprey at the main base, and then transfer the whole thing over. It works well for the Cult bases and HQ since those stick around for a while. The dragonfly can handle local stuff (e.g. Outposts for easy money).
Extra bases also let you build out more Labs and get more Scientists. While Scientists are expensive, in the long run they make you money. You can research all the cheap weapons and prisoners for points. Points early on means that the funding increase carries forward for your entire game.
The critical research before 1999: Promo III, Radar, Interceptor, Stingray, Kitsune. Try your best to get Personal Armor (or even Cyber Armor, which is the armor you'll be using for a very long time). That requires a bit of luck -- capturing a live alien in a UFO landing, but it looks like in your save, you've already got what you need.
I'm surprised you don't have Kitsune though. I'm not sure what triggers it (you get a notification of Lost Alien Ship Data), but getting the Kitsune means that you basically have worldwide transport range (and in a ship that is both fast and can defend itself). That's why getting the Skyranger / Skymarshall isn't critical before 1999.