After some reading regarding bf measurment, it turns out that bod pods or dexa's and the like still aren't that accurate at all and can have up to 10 or 15% variance for an individual. No matter the tool, it is always but a guess, an estimate you are having.
Therefor, my final decision is to not have a Dexa scan, as this will only confuse me on my journey of mass gain. I must simply continue the path I have chosen, with as little distraction as possible. While bodyfat callipers might be inaccurate for a good first BF estimate, they are great to measure changes in bf. You might measure incorrectly, but you will measure incorrectly exactly the same every time. According to these changes you can adjust calorie intake. Say for example you gained 1,2 kg in the course of a month, and, in the same period your bf% went up by 1%. Given your bodyweight and your initial bf, you know that about 50% of your weight gain has been fat. according to that, you can reduce your intake by say 100kcal to optimize your diet and reduce fat gain in the upcomming month. 100kcal will be for example around 50gr of chicken and a slice of bread. That is all it takes and no further changes are needed. If you micromanage your intake that way, and act upon your metrics, I am convinced you can really reduce fat gain to the bare minimum. Your 'bulk' will be greatly extended since you will not have to cut as cutting can always mean losing whatever muscle you build in the first place. Since you might gain only 1 pound or 1,5 pound in an entire month, things will go very slow, but this slow will, over the course of a year add up to more then 15 pounds, of which two thirds or more will be actual muscle! That is the horizon we need to set for ourselves. There simply are no quick solutions! It might take three or more years to reach your final goal, but we have to be in it for the long haul!
My own bf, based upon my own calliper measurements is now just a little over 0,5% more then one month ago and sits at just a little over 14%. I am very happy about that and it indicates me that there are no dietary adjustments needed at this point since, while I'm gaining weight rather slowly, I'm still adding some fat as well. Once my bodyweight increase stalls, I expect to see a stall ot even a decrease in bf as well. At that point I can raise my calorie intake by say 100kcals.
That is not much, but I found that my body reacts very quickly to changes in caloric intake. The slightest increase or decrease will make the scale move. So, this is very usefull to micromanage my intake