You are quite correct. Elliott Grove said to me that no-one became a classical musician without listening to someone else play classical music first. Many screenwriters begin writing without having read a screenplay. That said, he also sold me the book "The Last Word" by Tom Lazarus. This contains correspondence between the author and wannabee scriptwriters that he was advising. This sounded irrelevant because they were not my screenplays, but upon reading, it opened up a valuable insight into what makes a script "work" and just as importantly, what makes a script "stink".
Tarrantino said that screenplays should be readable and complete in themselves, hardly needing to be made into a film. The screenplay for "Pulp Fiction" starts with an unfair description of the smoking habits of we British which has no relevance to any film that could be made from it.
Why do you need a portable machine? It's an expensive way to get processing horsepower. I picked up a second hand I7 PC box via Ebay for £220. I added an SSD boot drive for some extra zip and away I went. Not only is a desktop inherently more reliable, if any part breaks, I can just replace that part fairly easily. It's also easier to back up your data with a box computer whether MS or Mac. Imagine what it would be like to not just have your computer die on you but to lose all the data too (by data, I mean film footage, of course).
What are the voting points for? What do they achieve? If a topic is of interest to me then I will read all the comments and make up my own mind about their value. Just because some people think that spmeone else is a bit of a thickie, that doesn't mean that I don't want to hear what they have to say. In fact, if someone is playing Devil's Advocate then quite possibly they will make the best reading.
If I discover tomorrow that I am now at -10,000 for posting this, I don't intend to cry myself to sleep over it.
Aliexpress £63 incl postage to the UK, although there is also customs duty to pay. Unless you are too chicken to buy by post, sight unseen, from a Chinese car boot sale.