I think with a good machine, you may well find that you may use it far more frequently than you thought you would. A time switch is a very handy accessory...
Firstly, Id suggest that you should probably allocate at least $500 of your funds for the purchase of a decent grinder. Your Sunbeam will barely cut it. Id suggest that you start the shopping no lower than a Compak K3T. With $100 for bits and pieces such as a good tamper, this will leave you around $1.9K to play with.
Assuming that the budget is pretty firm and you want HX, you might look towards something like:
[*]Expobar Office SA/FA (nb these will require a thermostability upgrade to behave nicely)[*]Expobar Office eb-61 leva (better choice IMHO)[*]Bezzera BZ07[*]Diadema Regal 1.3L/Diadema Junior Semi-auto[*]A 2nd hand HX machine in good nick. Be careful though- there are lots of dogs out there. Best (safest) place is here in the hardware for sale area of the forum. Ex CS machines are generally well maintained.
At $2.5k you have a whole heap of great options, but will be severely held back by what is essentally an inadequate grinder.
My advice is to avoid volumetrics and keep it simple. The lever operated machines have fewer things to go wrong and ultimately a lever of this style is just a sexy off/on switch. You dont need volumetrics to texture your milk while your shot pours.
If milk is not too important and you intend only to make a couple of drinks per session, perhaps a dual purpose single boiler machine- like a Diadema Perfetta or Vibiemme Domobar Piccolo. Our Perfetta/K3T package will leave you plenty of change.
The most mportant thing is to buy once (more) and buy right. Every tme you trad up, you lose $$$.
You are welcome to make contact if we can assist.
Happy shopping ;)