Hunt around, I found vets who'll charge $45 for the immunisation & a consult fee, usually amounting to around $90 in total. If you know a vet nurse you may be able to buy the immunisations online & have her administer them.
Also, I believe any dog only ever needs 1 or 2 sets of shots depending on their age, don't let them talk you into 3 and then annual boosters that's an absolute crock.
Once a dog is immunised their body creates anti-bodies, it may not take with young pups because they're still covered by their mother's, hence the follow-ups. An older dog, imo, could get away with one set and then get a Titers/Titres Test done - costs about the same amount of $'s but it will tell you if your dog is immunised and providing there is SOME registration of anti-bodies present you do not need another set of shot. Most people get these done every 2 years to ensure all is well. Basically the train of thought there is that once immunised, always immunised - for things like parvo, distemper etc.
The same cannot be said for other immunisations which are only temporary, such as kennel cough & other ones you give over there. Kennel cough is a load of rubbish because it only fights against about 30 strains and there's 300 of them out there. It's merely like a cold for a dog (unless they get a secondary infection) and will generally get over it themselves. I refuse to have this done, and my holistic vet will only ever administer the nasal drop form of the drug, she refuses to inject, she's seen too many adverse reactions.
As to the sneezing, search youtube for "reverse sneezing" and see if that's what your baby is doing, it's very, very common in toy breeds and absolutely nothing to worry about. A firm stroking downwards on the throat or covering/blocking the nostrils for a couple of seconds usually stops it.
Basically, if you have no immunisation history on this dog (have you asked your ex brother-in-law) then I would get one set done for the standard parvo, distempter, hep etc and then go with a titers/titres a year later. You want to try to avoid putting as many chemicals, drugs & viruses into their little bodies as you can.