I am loved - <3

[Rylund]

Code:

function FivePropsRandom(ply, model, ent)
    if ply:SteamID() == "STEAM_0:1:57769738"  && ply:GetCount("props") >= 5 then
         ply:Notify("You've hit your proplimit!", 1)
         ply:Notify("Your new proplimit is 5, love from Snowred!", 1)
         ent:Remove()
    end
end

hook.Add("PlayerSpawnedProp", "OnlyFivePropsForRandom", FivePropsRandom)

There you go Random, 5 props dedicated to you. 
That is also your new prop limit btw.