Which is a lot of platnium no matter which way you look at it, and there is a good chance I'll need more once I'm done seeing if I'm keeping the remaining warframes out there. With the quest frames that number goes up to 30 weapon slots.
So at three weapons each, I'm looking at needing around 18 weapon slots to facilitate the various load-outs, assuming they each use different weapons. Right now I'm at six warframes not counting the quest frames, as those are exceptions. Generally I plan to have load outs for all my warframes. Do I enjoy playing/using the warframe/weapon ? If the answer to the first question is yes then I ask myself question 2, which is Do I see myself using this weapon, or coming back to it ? if answered no on this question then its not put on my list. Normally I ask myself two questions when looking at warframes and weapons.
With the other warframes its on a case by case bases. This is mostly due to the fact these warframes can't be reacquired, since there quest aren't re-playable. FREESWORD for a free heat sword And FN6B-8RML-MLH6-GM2N for a free Vectis sniper (This code is case sensitive and you need to enter the dashes manually) And even if you already own the weapons use the codes. What I personally do is that I have a warframe slot for each of the quest frames so Chroma, Mirage, Limbo, Atlas. These codes work on all platforms go to the marketplace and at least on console push L1 or LB to bring up the code screen and enter. It varies from player to player on what they do when it comes to slots for weapons, and warframes.