You misunderstand
"In a negative TC your min bet should be the table's min."
In a negative TC, you shouldn't be playing! However, the above surely isn't always true. You may be spreading 1-12 in green, for example, and playing at a $5 or $10 table. You may be spreading 1-16 in black, but playing at a $25 table. Happens all the time. You certainly do NOT always bet the table min in a negative count. It isn't always practical and certainly isn't right, for the sake of cover.
"If we assume the min bet is $10 for the table, you wil not be able to play two or three hands of $5 each. In some casinos the min bet for playing multiple hands is twice the table min; that's $20 each hand. So in above situations there is no advantage of playing multiple hands at all."
Surely, you realize that I understand all that. I was simply pointing out the mathematics of card eating. I'm aware of all the practical ramifications.
"The example you gave is mathematically correct but seems not realistic in today's casinos."
Much more realistic than you might imagine. See above.
Don