@bandinni13. Another vaporizer to consider is the Aromed 4.0. It comes complete with water filtration and, as I understand it from chatting to a few people with them, it hits at the lower / cooler end of the spectrum.
One thing to consider is always taking micro hits. If you only take very very small hits, through water, the irritation should be reduced even more. It's the big lung-fulls that will irritate your throat.
@Jiltut. Medicating with cannabis is a tricky thing whether you are using flowers, concentrates or edibles/tinctures. As you stated each strain has it's own effects due to their complex variety of CBD's which affect us in different ways. Also, there is the issue of tolerance build-up to consider and individual's 'built-in' tolerences.
For me personally, I self medicate for insomnia and RLS, I find that having multiple strains is a must. I will stick to two strains for a few days - when I feel that I need higher doses to get to the same place I will switch strains. I try to keep my strains, doses and temps lower in the day so that I have stronger effects in the evening to aid sleep. Also, I know this one isn't for all, I find having different performing vapes a big help too. I tend to use the 'lighter' hitting vapes earlier on and do heavy bong hits in the evening.
As I don't have access to concentrates I use a MFLB throughout the day to combat the RLS. If I could get concentrates I would seriously consider something like an Omicron or Thermo Revolution too. As it is I use my MFLB as my travel medication device. I find that I only need 1 trench throughout the day to keep the irritation at bay. It's stealthy so no problems taking 1 quick hit almost anywhere whenever I feel the 'itch'.
To answer a few of your questions directly:
* Why is hot water better? Is it better? Some people may prefer it as they find it easier to take hits, but personally I don't like it - but I have always hated steam rooms and saunas and it kind of reminds me of that.
* How am I going to manage all day with vaporizing / how long should I leave between vapes to keep as steady an effect as possible? If you are recently coming from smoking you are going to have to cope with a transition period where your body is getting used to this new form/concentration of THC/CBD/CBN. You may feel like your not getting effects. Don't worry, that will pass. I believe the key to all day medication is to have an effective portable - unless you are house bound - coupled with an effective home unit.
I find it's about every 2 hours I need a 'top-off' hit. After a little experimentation and using some of the tips posted above I think you won't have any problems finding the right level for you. Every ailment for each individual person will need different levels of medication to be effective and maintain.
* Can 1 vape session have lasting effects all day? For me this is not the case. You may find that for you this works, but imo I don't think it will. If you need to feel the effects all day I think you will have to get a portable.
I have just related your questions to my own personal experience. Others may have a totally different take - this is just a point to work from. I think you'll find that a hundred people can give you advice but none of it is worth as much as your own personal experience and experimentation.
Good luck in finding your 'Perfect Level'.