I can only speak from personal experience, and I haven’t done too much punting abroad, but for me Hong Kong was the ultimate place for punting!
Well you will get no shortage of massage with HE for 250-350 HKD which was about £23-24 when I was out there. You literally can't move for seeing these places. They are cheaper off the main island, expect to pay a bit more on the Island side. If you negotiate you can get extras, often OW for another 100-200 and sex for 200-300 on top. Expect a full service 1 hour in these "Massages" places for around 500-600 HKD. I doubt they do BB, but I wasn't looking but I couldn't get any OWO from these places. You might get lucky.
You have a few Sauna places where you can pay around 350-600 HKD, do a search on here or ISG as they will explain them better, I didn't use these places in the end. There are a few bar like places where you can go in and select a lady and go to a room for a set price (around 500hkd), there is one in Jordan on Dundass street. There is some good information on these places if you search.
There are lots of walkups (literally thousands, sometimes entire apartment blocks) at ridiculously low rates (200 hkd upwards) for full service, but due to the reviews I determined that people rated these experiences as rushed and mechanical so I didn't try these. There is a website, I think it’s called sex141 or similar that helps search for locals, I didn't do too well off it but again you may have a different experience. There is a huge bar scene where you can negotiate with freelancers and bar girls alike. Prices vary but I was paying around 500 hkd (short time/1 pop) up to 2000 hkd for overnight (prices go higher but these are what I found).
There are ads on craigslist but I found these vastly overpriced with quotes of up to 10,000 hkd for overnights so unless you can be bothered to sort through the crap (I couldn't after emailing half a dozen) then give this a miss as there are far better options.
My personal favourite was "pulling" the women from the disco clubs (New Makatai & La Kwai Fong are the best I found) where the women will flirt with you and act like your girlfriend, this means you get to have a lot of groping, kissing and chatting with no obligation to buy (make use of it). Services vary but all the ones I had were charging around £1400-2000 hkd for an overnighter. Most of these women are Phillipino or Indonesian but some are stunning and were truly amazing experiences. This is a grey area as most are domestic helpers by day and earn about 2000 hkd a month doing that so you can negotiate on quiet nights and take back to your hotel. I got all the services I wanted here, I asked what was off limits and the answer was usually "nothing" and they lived up to their promises. The best bit of all this is the women you take from these places will NEVER ask for the money up front and will hang around until you pay them in the morning. Personally I paid around 1000hkd a night for Indonesian stunners (after negotiation) and totally ruined them all night, including anal. I found this all an experience that made punting less robotic but its each to their own....
If this lot isn't enough then grab a ferry to Macau, it's literally full of places to pay for sex.