Hi Wheelyman - Welcome to Pherotalk.
Well, you ain’t the only person with movement problems on here - I’ve been struggling with a foot problem that have severely restricted my movement for most of this year - but I have still managed some good successes with pheros and can get a wide variety of hits all the time! 
I’ve also used Alter Ego before and still use it occasionally as its oil base complements A314 oil very well - You will find threads about getting the best from it if you search.
You say you are middle aged? Could you edit your profile so we can see - This is not to pry, age is actually a very important factor in phero use and guys our ages can find significant differences and approaches compared to younger guys. Then there is the matter that a woman’s response to pheros can often change as she ages. The broadest quick example is that a young woman (teens-20s) is likely to respond well to a far lower dose of Androstenone than a woman in her 30s and over. To the point where the younger girl may be repelled by the sort of dose that her older pal might find very attractive.
You may also find that as they age, the status pheros like A314/IG may prove more attractive than the fun/chatty pheros like IS/IO - Although broadly, the socials are good at any age.
You mention wanting P83 - It is a good one but its not exactly a phero for newbies and I would suggest you find your feet with the Instant Line first, do a fair bit of reading and then think about it. P83 is also subject to supply problems and the reason you are seeing a silly price is because it is out of stock completely or so low that its sale is restricted to Reporting Users only (you get RU status by submitting regular reports). However, I would hope it won’t be too long before it is back on general sale as it is one of the more accessable putatives. Keep an eye on the Store forum for a regular snapshot of stock/supply issues.
Now, if you are getting IS and A314, you should also consider Ammo, especially if you have used AE before. Ammo is a balanced social/sexy/attractive phero mix that is good in most social situations and complements IS superbly - In fact, Ammo and IS is one of the classic mixes!
Because of your age, it might be worth considering the 2x or “heavy” version of Ammo as our none output falls as we age, so it is likely that guys our age are putting out a lot less than someone in their early 20s. However, it is also advised that you should find your effective dose with the 1x version first and only then move-up to the heavy version if the doses add-up.
You may also want to consider getting the F22 or “World Edition” scent for Ammo, as the scent of the standard version is a rather polarised subject - IMO, F22 is much better and sits better with European sensibillities.
Lastly, where about in NL are you? I spent an interesting year in Amsterdam a good while back and family in Holland means I know the Gouda, s-Hertogenbosch/Eindhoven areas pretty well.
It is funny that when I go clubbing I do get hits with phero’s, which is AMAZING considering my position 