I did it, bought the bricks on the hi-way in Daro, and just got stuck in and did it myself, a bit dusty cutting the bricks (i would suggest using the days quota of bricks, be soaked at least 24 hours before use to cut down on the dust it's a real real fine dust) will be very very surprised how much water each brick will soak up the excess water will also help in the mortar not drying out too quickly, but will give you a minute or two to set up the brick to its required location, I'm not in the Philippines now, so can't send you pics but it worked a treat in fairness
two bits of advice if you're going to do it yourself
be patient, once you get started on the brickwork itself its a lot of cutting, the dome is not so difficult really
the door ratio to height of dome you read about is not hocus pocus so pay attention to it
just sit down workout the numbers, dont rush into just to get it finished
and once its completed what a joy, works a treat too
I did it all myself everything, planning buying carrying mixing cutting building, sweating crying kicking
when I went to the brick place and went out the back, to watch them make the bricks and saw the mountain of raw clay, got me thinking we have a lot of clay at home too, watched a few videos how to extract it (stick in water overnight then sieve it as best you can let it dry), i used it for the base of the floor applied it let it crack and dry then filled the cracks, let it dry and fill again 4-inch raw clay base then lined it with the brick to complete the floor and started the dome from that point
hard to describe the heat from it, before actually putting food in there better figure how your going to slide the food in and out, have the long utensils as the heat is immeasurable out of it and cant stand real close to the door of it, still watching the arm hair re-grow (don't be brave after a few red horse)
don't be put off by the dome, plan your work, have the brick bought before you start and have them soaking and the bricks are not uniform, they won't all match in size and area but its great to work with clay, and when finished its awesome just awesome
I went to the lumber yard, bought the big cuts of waste coco lumber, and used that
I did it from march to June last year