The printer I currently use is an HP laserjet 2100 that replaced my laserjet 4. They are really old printers but do a superb job at printing. Caution, they do weight a lot as they contain lots of metal, that stuff that existed before all the plastic they use now
The one I have was made in 1998, has printed 900,000 pages and still works fine, I bought it on ebay, shipped for $40
I think the problem some are having with using an iron is the iron can be too hot and you cannot get enough even pressure.
With the laminator if the board is cold you need to warm it up doing multiple passes through the laminator with the sheet on it till you notice it start to stick, then do it a couple more times, the board will become too hot to hold so use a towel or cloth to hold the board. I run it through about 6 or 7 times turning the board each time. Might seem like a lot of time, but it really only takes a couple minutes.
For double sided boards I apply the first toner sheet to one side
Run the board through the laminator
Remove the paper
Drill 3 holes that will be used to line up with the second side of the board
Align second side of paper with the holes while holding the board over a light
Run the second side through the laminator, the toner already on the first side will not come off, the rollers are a special type of rubber that is non stick.
Remove the paper and etch. The holes are so small that over etching doesn't occur.