Tabletop tripod
Your scope weighs 2.5 kg. You need a pretty solid photo tripod to stably support something that weight and with some length. Ignore small cheap tripods on ebay that claim to be rated to 12kg.
Even a Manfrotto 190 ($400) won't hold that weight with stability. You want something like a Manfrotto 475B($800) which is outside your budget and too big for a table top.
If you want a budget tabletop solution, Make yourself a DIY tabletop DOB mounting for it. If it's for your GF to look horizontally while seated at the table, don't make the sides tall enough for the scope to look up into the night sky. Keep it squat so she can sit and look horizontally. If you make a modular design, you can have exchangeable sides so that you can interchange the short sides with taller sides allowing for upward astro viewing.
For a 2.5kg OTA, you can make the whole thing very simply from dressed pine and lubricate the sliding surfaces with danish wax, candle wax or even soap.
Joe
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