You can try those listed under mastery academy. Of course if you engage the boss, Joey Yap it is extremely expensive but those under him should be cheaper. I went to KL and study 8 mansion module 1 & 2. Not into practicing as master but more for self knowledge so can avoid bad fengshui.
I ever experience chaotic magnetic field before, followed a friend to a building in robertson quay and see myself how the luopan needle goes crazy when we walk from one end to another. The location iself is no good (wrong side of the river bend) and having a tunnel nearby.
I personally ever detected a flat in Parc Oasis when accompanying a friend who want to rent a flat there, where the luopan needle also goes crazy but not as bad a what I have seen in above case. When I was there also I got headache so much until I forgot my umbrella and my singapore map book there.
This was in 2001.
Of course when you apply flying star (xuan gong) then at some time these place can be good, so go ahead and rent during these time. I am more into 8 mansion cos this is more applicable if you want to be there for a long time (may be to buy - or sign a long lease like 10 yrs). Also it is in good english. The rest I cannot tahan cos the master keep referring to chinese and mine is hen ji tan, my head spinning on the language rather than trying to understand the concept.
I like the material done by Joey Yap cos it is more on the location and position rather than buying crystals, mirrors, statues and pots and digging ponds and making small hill on the garden. Plus the approach is more scientific (with less religious undertones). Also it is in english so I get to understand the concept better. My chinese is hen ji tan.