This can be done using FTP. https://survivalservers.com/wiki/index.php?title=FTP_Access
If you need further assistance, please submit a support ticket.
Since the last update, there have been no issues with RAM utilization. You should be just fine. The main issue you can run into issues with are Mods. That really only happens if you add a ton. If not, please submit a ticket if you choose to purchase a server.
In my opinion, there are no top 5 mods that are needed. It is more along the lines of what in the game does not work for you or what do you want changed? A lot of settings can be changed without the need for mods. The main mod that I always used was a mod called untameables. It always you to tame dinos/creatures that would otherwise not be possible to tame. Otherwise, you may want to check out our wiki. https://survivalservers.com/wiki/index.php?title=ARK:_Survival_Evolved_Advanced_Configuration.
Not at this time but you can access your control panel from anywhere you have an internet connection/internet browser. For FTP, there are apps for that if desired.
This should be in the .cfg file that you would access using FTP. https://survivalservers.com/wiki/index.php?title=Rust_Server_Settings
If you know the direct command, you can also enter them in the console or check out Oxide and add possible plugins.
Our wiki should be able to assist you.
https://survivalservers.com/wiki/index.php?title=ARK:_Admins,_Server_Maintenance,_and_General_FAQ#Whitelisting_Admins_.28PC_Only.29
Otherwise, feel free to submit a support ticket.
Satisfactory does not currently support mods at this time (specifically dedicated servers). I am sure once the developers have their servers in the state they want, they may review that possibility. Although, I am aware unofficially some claim to be able to do it, but they are not stable or they saw it somewhere on a forum elsewhere. Server stability is one of our top priorities. If we find a way or if an unofficial way becomes popular we may review those possibilities as well in the future. Similar to Valheim. Valheim does not have mod support but with time, unofficial framework was made by the community to support mods and works fairly well.
Glad to hear you figured this out. Always feel free to submit a ticket for account specific issues. The forums is a great place to ask for help on how tos and general questions.