It is now 5 days after my 3X splash racking. I gave it a smell and the sulphur smell seems to be dramatically improving... there might be hope for my first vintage from real grapes afterall? I believe I can attribute a lot of this to the adding of k-meta post fermentation and having the carboy under vacuum. I pump it once a day and can see very small bubbles coming out of the wine which I believe to be sulphur gasses (H2S, SO2?) rather than CO2.
I'm a bit lost at this point in the process. Having only done kits up until this point, I'm not sure if I am supposed to wait longer than I'm used to for bottling?
The sulphur smell is generally due to stressed yeast. Next batch, consider adding yeast nutrient at the midpoint of fermentation.
As for what to do next, your wine needs to clear and degass. If you can wait 6+ months, it will do both without chemicals or vacuuming. Add kmeta every three months, I use 1/4 teaspoon for six gallons.
If not, you can degas by vacuum and clear by adding superkleer KC. Note that some folks are sensitive to superkleer's shellfish-based ingredients, so you may want to label your wine with that info.
Once clear and degassed, you can bottle.