AI Suite - Various Questions

Hello Altera Community
I have a few questions about the AI Suite

1. Estimating whether a model will fit on an FPGA using a formula

Suppose I have a neural network with x amount of layers and y amount of neurons in each layer.
Then say I have a baord with an amount of DSP/ALMs/LUTs

What could be an approximating formula (It does not need to be accurate). And what are the typical limiting factors?

2. Impact of the enable_parameter_rom parameter

Is it correctly understood that this parameter determines whatever the mif (Memory initialization files) containing the weights are put inside a rom or external memory?

Does this actually impact the speed? I would assume that the external memory might be faster than some of the bottleneck components in the AI IP block.

3. Any architecture options for the Spatial IP?

My model uses a 16bf * 6 input, so I think it would make sense to increase the input stream size so it matches. But I don't know if the same options from the sequential IP also applies to the spatial IP, since the example is just two lines.